#6367C4
Closest named color: Dark Periwinkle (#665FD1). oklch(55.6% 0.142 278.9), rgb(99, 103, 196).
Aa
White text reads best on this color (4.92:1).
About this color
#6367C4 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.142 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.030 away. White text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.26:1 |
| White text | 4.92:1 |
Values
| HEX | #6367C4 |
| RGB | rgb(99, 103, 196) |
| HSL | hsl(238, 45%, 58%) |
| OKLCH | oklch(55.6% 0.142 278.9) |
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 #6367C4 | 4.92:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #6367C4 | 4.26:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #6367C4 text on white | 4.92:1 | AA | Lc 73.9 | Content text, not long reading |
| #6367C4 text on black | 4.26:1 | AA large text | Lc -27.8 | 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
#D3D7F1
oklch(88.4% 0.036 278.7)
-
Step 300
300
#B7BDEA
oklch(80.9% 0.064 278.9)
-
Step 400
400
#939AE0
oklch(70.8% 0.102 279)
-
Step 500
500
#797FD7
oklch(63% 0.131 279)
-
Step 600
600 (this color)
#6367C4
oklch(55.6% 0.142 278.9)
-
Step 700
700
#5255A9
oklch(49% 0.132 278.8)
-
Step 800
800
#434689
oklch(42.7% 0.109 278.8)
-
Step 900
900
#383B6E
oklch(37.6% 0.086 278.8)
-
Step 950
950
#212340
oklch(27% 0.054 279.2)
#6367C4 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) | #3E74C7 | 0.050 |
| Deuteranopia (no green cones) | #366DC2 | 0.052 |
| Tritanopia (no blue cones) | #3E7B8C | 0.124 |
| Achromatopsia (no color) | #707070 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6367C4
#6367C4
oklch(55.6% 0.142 278.9)
- #857300
#857300
oklch(55.6% 0.115 98.3)
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 #6367C4, closest first.
No curated palette has a color within ΔE 0.04 of #6367C4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.030
- Slate Blue #6A5ACD ΔE 0.037
- Iris #6258C4 ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.039
- French Blue #436BAD ΔE 0.057
- Royal Blue #4169E1 ΔE 0.059
- Windows Blue #3778BF ΔE 0.063
- Warm Blue #4B57DB ΔE 0.066
Use #6367C4 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.