#631337
Closest named color: Burgundy (#610023). oklch(33.9% 0.117 358.4), rgb(99, 19, 55).
Aa
White text reads best on this color (12.50:1).
About this color
#631337 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.117 and its hue 358°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.035 away. White text reads best on it, at 12.50:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.117) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.67:1 |
| White text | 12.50:1 |
Values
| HEX | #631337 |
| RGB | rgb(99, 19, 55) |
| HSL | hsl(333, 68%, 23%) |
| OKLCH | oklch(33.9% 0.117 358.4) |
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 #631337 | 12.50:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #631337 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #631337 text on white | 12.50:1 | AAA | Lc 97.3 | Preferred for body text |
| #631337 text on black | 1.67:1 | Fails | Lc 0.0 | Not readable |
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 900.
-
Step 50
50
#FDF2F5
oklch(97.1% 0.012 358.8)
-
Step 100
100
#F9E3E9
oklch(93.5% 0.025 359.2)
-
Step 200
200
#F5CCD9
oklch(88.4% 0.049 357.1)
-
Step 300
300
#F0A9C0
oklch(80.9% 0.088 358.2)
-
Step 400
400
#E578A0
oklch(70.7% 0.141 358)
-
Step 500
500
#DA5088
oklch(63.1% 0.18 358.5)
-
Step 600
600
#C52D72
oklch(55.6% 0.194 358.4)
-
Step 700
700
#A91D60
oklch(49% 0.181 358)
-
Step 800
800
#8A1C4E
oklch(42.8% 0.15 358.5)
-
Step 900
900 (this color)
#631337
oklch(33.9% 0.117 358.4)
-
Step 950
950
#411426
oklch(27% 0.073 358.3)
#631337 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) | #242A38 | 0.132 |
| Deuteranopia (no green cones) | #3A3935 | 0.118 |
| Tritanopia (no blue cones) | #6C0623 | 0.037 |
| Achromatopsia (no color) | #343434 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631337
#631337
oklch(33.9% 0.117 358.4)
- #004238
#004238
oklch(33.9% 0.062 178.5)
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 #631337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.035
- Merlot #730039 ΔE 0.036
- Claret #680018 ΔE 0.048
- Grape Purple #5D1451 ΔE 0.049
- Bordeaux #7B002C ΔE 0.055
- Velvet #750851 ΔE 0.059
- Wine Red #7B0323 ΔE 0.061
- Wine #80013F ΔE 0.063
Use #631337 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.