#6367C0
Closest named color: Dark Periwinkle (#665FD1). oklch(55.3% 0.136 279), rgb(99, 103, 192).
Aa
White text reads best on this color (4.96:1).
About this color
#6367C0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.136 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.035 away. White text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.23:1 |
| White text | 4.96:1 |
Values
| HEX | #6367C0 |
| RGB | rgb(99, 103, 192) |
| HSL | hsl(237, 42%, 57%) |
| OKLCH | oklch(55.3% 0.136 279) |
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 #6367C0 | 4.96:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #6367C0 | 4.23:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #6367C0 text on white | 4.96:1 | AA | Lc 74.2 | Content text, not long reading |
| #6367C0 text on black | 4.23:1 | 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
#B7BDE8
oklch(80.8% 0.061 278.7)
-
Step 400
400
#939ADD
oklch(70.6% 0.098 279)
-
Step 500
500
#7A80D4
oklch(63.2% 0.126 279.1)
-
Step 600
600 (this color)
#6367C0
oklch(55.3% 0.136 279)
-
Step 700
700
#5356A6
oklch(49.1% 0.126 279.1)
-
Step 800
800
#444787
oklch(42.8% 0.104 279)
-
Step 900
900
#393C6C
oklch(37.8% 0.081 279)
-
Step 950
950
#21233F
oklch(26.9% 0.052 279.2)
#6367C0 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) | #4274C3 | 0.048 |
| Deuteranopia (no green cones) | #3A6CBE | 0.048 |
| Tritanopia (no blue cones) | #407A8A | 0.119 |
| Achromatopsia (no color) | #707070 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6367C0
#6367C0
oklch(55.3% 0.136 279)
- #847300
#847300
oklch(55.5% 0.115 98.9)
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 #6367C0, closest first.
No curated palette has a color within ΔE 0.04 of #6367C0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.035
- Iris #6258C4 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.040
- Light Indigo #6D5ACF ΔE 0.043
- French Blue #436BAD ΔE 0.052
- Windows Blue #3778BF ΔE 0.062
- Royal Blue #4169E1 ΔE 0.063
- Mid Blue #276AB3 ΔE 0.068
Use #6367C0 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.