#63100B
Closest named color: Reddy Brown (#6E1005). oklch(32.6% 0.117 28.9), rgb(99, 16, 11).
Aa
White text reads best on this color (13.04:1).
About this color
#63100B is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.117 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.026 away. White text reads best on it, at 13.04:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.117) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.60:1 |
| White text | 13.04:1 |
Values
| HEX | #63100B |
| RGB | rgb(99, 16, 11) |
| HSL | hsl(3, 80%, 22%) |
| OKLCH | oklch(32.6% 0.117 28.9) |
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 #63100B | 13.04:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #63100B | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #63100B text on white | 13.04:1 | AAA | Lc 98.0 | Preferred for body text |
| #63100B text on black | 1.60:1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F8CEC7
oklch(88.6% 0.049 29.1)
-
Step 300
300
#F4ABA0
oklch(80.8% 0.088 28.7)
-
Step 400
400
#EB7C6D
oklch(70.8% 0.14 29)
-
Step 500
500
#E15445
oklch(63.1% 0.179 29.1)
-
Step 600
600
#CC3026
oklch(55.5% 0.194 28.8)
-
Step 700
700
#B02018
oklch(49.1% 0.18 29)
-
Step 800
800
#8F1E17
oklch(42.7% 0.15 28.8)
-
Step 900
900 (this color)
#63100B
oklch(32.6% 0.117 28.9)
-
Step 950
950
#441510
oklch(27.1% 0.074 28.9)
#63100B 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) | #2B2509 | 0.125 |
| Deuteranopia (no green cones) | #3F3707 | 0.113 |
| Tritanopia (no blue cones) | #6E0010 | 0.027 |
| Achromatopsia (no color) | #313131 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63100B
#63100B
oklch(32.6% 0.117 28.9)
- #003C44
#003C44
oklch(32.6% 0.056 209.4)
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 #63100B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.026
- Claret #680018 ΔE 0.026
- Burgundy #610023 ΔE 0.043
- Blood #770001 ΔE 0.043
- Wine Red #7B0323 ΔE 0.061
- Maroon #800000 ΔE 0.063
- Chestnut #742802 ΔE 0.065
- Bordeaux #7B002C ΔE 0.069
Use #63100B 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.