#6367E5
Closest named color: Dark Periwinkle (#665FD1). oklch(57.8% 0.187 277.4), rgb(99, 103, 229).
Aa
Black text reads best on this color (4.60:1).
About this color
#6367E5 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.187 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.034 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #6367E5 |
| RGB | rgb(99, 103, 229) |
| HSL | hsl(238, 71%, 64%) |
| OKLCH | oklch(57.8% 0.187 277.4) |
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 #6367E5 | 4.56:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #6367E5 | 4.60:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #6367E5 text on white | 4.56:1 | AA | Lc 71.3 | Content text, not long reading |
| #6367E5 text on black | 4.60:1 | AA | Lc -30.3 | Non-text elements, placeholder text |
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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B3BCF7
oklch(80.9% 0.084 277.6)
-
Step 400
400
#8D97F3
oklch(70.7% 0.134 277.7)
-
Step 500
500
#737AEF
oklch(63.1% 0.173 277.7)
-
Step 600
600 (this color)
#6367E5
oklch(57.8% 0.187 277.4)
-
Step 700
700
#4D4EC0
oklch(49% 0.174 277.4)
-
Step 800
800
#3F419B
oklch(42.7% 0.143 277.5)
-
Step 900
900
#35387B
oklch(37.6% 0.112 277.7)
-
Step 950
950
#1F2148
oklch(26.9% 0.071 278.2)
#6367E5 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) | #047BE9 | 0.076 |
| Deuteranopia (no green cones) | #0070E2 | 0.072 |
| Tritanopia (no blue cones) | #12849C | 0.163 |
| Achromatopsia (no color) | #767676 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6367E5
#6367E5
oklch(57.8% 0.187 277.4)
- #8D7900
#8D7900
oklch(57.7% 0.119 97.6)
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 #6367E5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.034
- Medium Slate Blue #7B68EE ΔE 0.038
- Royal Blue #4169E1 ΔE 0.041
- Light Indigo #6D5ACF ΔE 0.044
- Slate Blue #6A5ACD ΔE 0.046
- Neon Blue #4361EE ΔE 0.046
- Cornflower #6A79F7 ΔE 0.051
- Warm Blue #4B57DB ΔE 0.055
Use #6367E5 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.