#63311F
Closest named color: Chestnut (#742802). oklch(37.5% 0.078 40.2), rgb(99, 49, 31).
Aa
White text reads best on this color (10.55:1).
About this color
#63311F is a dark, moderately saturated brown. In OKLCH its lightness is 37%, its chroma 0.078 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.039 away. White text reads best on it, at 10.55:1.
| Hue family | Browns |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.98:1 |
| White text | 10.55:1 |
Values
| HEX | #63311F |
| RGB | rgb(99, 49, 31) |
| HSL | hsl(16, 52%, 25%) |
| OKLCH | oklch(37.5% 0.078 40.2) |
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 #63311F | 10.55:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #63311F | 1.98:1 | Fails | Lc 9.8 | Not readable |
| #63311F text on white | 10.55:1 | AAA | Lc 94.1 | Preferred for body text |
| #63311F text on black | 1.98:1 | Fails | Lc -8.4 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F5E6E1
oklch(93.5% 0.018 39.4)
-
Step 200
200
#EDD3C9
oklch(88.6% 0.032 42.2)
-
Step 300
300
#E3B5A4
oklch(81% 0.059 41.3)
-
Step 400
400
#D38D74
oklch(70.8% 0.093 40.4)
-
Step 500
500
#C66E4F
oklch(63.1% 0.12 40)
-
Step 600
600
#B15533
oklch(55.7% 0.129 40.3)
-
Step 700
700
#984425
oklch(49.1% 0.121 40)
-
Step 800
800
#7B3920
oklch(42.7% 0.099 40.6)
-
Step 900
900 (this color)
#63311F
oklch(37.5% 0.078 40.2)
-
Step 950
950
#3B1D13
oklch(27% 0.05 39.1)
#63311F 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) | #3E381D | 0.074 |
| Deuteranopia (no green cones) | #4A431E | 0.068 |
| Tritanopia (no blue cones) | #6D282D | 0.039 |
| Achromatopsia (no color) | #3F3F3F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63311F
#63311F
oklch(37.5% 0.078 40.2)
- #00495A
#00495A
oklch(37.5% 0.068 220.1)
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 #63311F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.039
- Purple Brown #673A3F ΔE 0.047
- Reddy Brown #6E1005 ΔE 0.060
- Mud Brown #60460F ΔE 0.066
- Blood #770001 ΔE 0.074
- Maroon #800000 ΔE 0.080
- Claret #680018 ΔE 0.081
- Wine Red #7B0323 ΔE 0.081
Use #63311F 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.