#63370F
Closest named color: Mud Brown (#60460F). oklch(38.4% 0.081 58.1), rgb(99, 55, 15).
Aa
White text reads best on this color (10.07:1).
About this color
#63370F is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.081 and its hue 58°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.043 away. White text reads best on it, at 10.07:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #63370F |
| RGB | rgb(99, 55, 15) |
| HSL | hsl(29, 74%, 22%) |
| OKLCH | oklch(38.4% 0.081 58.1) |
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 #63370F | 10.07:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #63370F | 2.08:1 | Fails | Lc 10.8 | Not readable |
| #63370F text on white | 10.07:1 | AAA | Lc 93.1 | Preferred for body text |
| #63370F text on black | 2.08:1 | Fails | Lc -9.4 | 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
#FAF4F0
oklch(97.1% 0.008 56.3)
-
Step 100
100
#F3E7DF
oklch(93.5% 0.017 56.2)
-
Step 200
200
#EBD4C4
oklch(88.5% 0.034 57.1)
-
Step 300
300
#DFB89A
oklch(80.9% 0.061 59.3)
-
Step 400
400
#CE9162
oklch(70.6% 0.097 58)
-
Step 500
500
#C07432
oklch(63% 0.124 58.2)
-
Step 600
600
#AB5C00
oklch(55.6% 0.133 58.3)
-
Step 700
700
#904C00
oklch(49% 0.117 57.9)
-
Step 800
800
#773E00
oklch(42.7% 0.102 58.2)
-
Step 900
900 (this color)
#63370F
oklch(38.4% 0.081 58.1)
-
Step 950
950
#391F0A
oklch(26.9% 0.052 56.9)
#63370F 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) | #443C09 | 0.062 |
| Deuteranopia (no green cones) | #4F460F | 0.056 |
| Tritanopia (no blue cones) | #6D2D2F | 0.057 |
| Achromatopsia (no color) | #424242 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63370F
#63370F
oklch(38.4% 0.081 58.1)
- #08496A
#08496A
oklch(38.5% 0.082 238.2)
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 #63370F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.043
- Chestnut #742802 ΔE 0.044
- Purple Brown #673A3F ΔE 0.061
- Green Brown #544E03 ΔE 0.074
- Reddy Brown #6E1005 ΔE 0.077
- Rust Brown #8B3103 ΔE 0.081
- Red Brown #8B2E16 ΔE 0.083
- Olive Brown #645403 ΔE 0.086
Use #63370F 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.