#6367BF
Closest named color: Dark Periwinkle (#665FD1). oklch(55.3% 0.135 279.1), rgb(99, 103, 191).
Aa
White text reads best on this color (4.97:1).
About this color
#6367BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.135 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.036 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #6367BF |
| RGB | rgb(99, 103, 191) |
| HSL | hsl(237, 42%, 57%) |
| OKLCH | oklch(55.3% 0.135 279.1) |
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 #6367BF | 4.97:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #6367BF | 4.22:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #6367BF text on white | 4.97:1 | AA | Lc 74.2 | Content text, not long reading |
| #6367BF text on black | 4.22:1 | AA large text | Lc -27.5 | 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
#D4D7F0
oklch(88.5% 0.034 280.2)
-
Step 300
300
#B8BDE8
oklch(80.9% 0.061 279.7)
-
Step 400
400
#939ADC
oklch(70.6% 0.097 278.9)
-
Step 500
500
#7A80D3
oklch(63.1% 0.124 279.1)
-
Step 600
600 (this color)
#6367BF
oklch(55.3% 0.135 279.1)
-
Step 700
700
#5356A6
oklch(49.1% 0.126 279.1)
-
Step 800
800
#444786
oklch(42.7% 0.103 279)
-
Step 900
900
#393C6C
oklch(37.8% 0.081 279)
-
Step 950
950
#21233F
oklch(26.9% 0.052 279.2)
#6367BF 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) | #4273C2 | 0.046 |
| Deuteranopia (no green cones) | #3B6CBD | 0.048 |
| Tritanopia (no blue cones) | #417A8A | 0.118 |
| Achromatopsia (no color) | #707070 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6367BF
#6367BF
oklch(55.3% 0.135 279.1)
- #837300
#837300
oklch(55.3% 0.115 99.6)
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 #6367BF, closest first.
No curated palette has a color within ΔE 0.04 of #6367BF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.036
- Iris #6258C4 ΔE 0.040
- Slate Blue #6A5ACD ΔE 0.041
- Light Indigo #6D5ACF ΔE 0.044
- French Blue #436BAD ΔE 0.051
- Windows Blue #3778BF ΔE 0.061
- Royal Blue #4169E1 ΔE 0.064
- Mid Blue #276AB3 ΔE 0.068
Use #6367BF 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.