#6568BF
Closest named color: Dark Periwinkle (#665FD1). oklch(55.6% 0.133 279.7), rgb(101, 104, 191).
Aa
White text reads best on this color (4.89:1).
About this color
#6568BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.133 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.038 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.28:1 |
| White text | 4.89:1 |
Values
| HEX | #6568BF |
| RGB | rgb(101, 104, 191) |
| HSL | hsl(238, 41%, 57%) |
| OKLCH | oklch(55.6% 0.133 279.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #6568BF | 4.89:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #6568BF | 4.28:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #6568BF text on white | 4.89:1 | AA | Lc 73.8 | Content text, not long reading |
| #6568BF text on black | 4.28:1 | AA large text | Lc -27.9 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D4D7EF
oklch(88.4% 0.033 280)
-
Step 300
300
#B8BDE7
oklch(80.9% 0.059 279.7)
-
Step 400
400
#949ADC
oklch(70.7% 0.097 279.6)
-
Step 500
500
#7B80D2
oklch(63.1% 0.122 279.6)
-
Step 600
600 (this color)
#6568BF
oklch(55.6% 0.133 279.7)
-
Step 700
700
#5456A5
oklch(49.1% 0.124 279.7)
-
Step 800
800
#454785
oklch(42.8% 0.101 279.8)
-
Step 900
900
#393C6B
oklch(37.7% 0.08 279.1)
-
Step 950
950
#22233F
oklch(27% 0.052 280.8)
#6568BF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4574C2 | 0.046 |
| Deuteranopia (no green cones) | #3E6DBD | 0.047 |
| Tritanopia (no blue cones) | #457A8A | 0.116 |
| Achromatopsia (no color) | #717171 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6568BF
#6568BF
oklch(55.6% 0.133 279.7)
- #847400
#847400
oklch(55.7% 0.116 99.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #6568BF, closest first.
No curated palette has a color within ΔE 0.04 of #6568BF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.038
- Iris #6258C4 ΔE 0.043
- Slate Blue #6A5ACD ΔE 0.043
- Light Indigo #6D5ACF ΔE 0.046
- French Blue #436BAD ΔE 0.053
- Windows Blue #3778BF ΔE 0.062
- Deep Lavender #8D5EB7 ΔE 0.066
- Royal Blue #4169E1 ΔE 0.066
Use #6568BF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.