#B3633B
Closest named color: Copper (#B66325). oklch(58.4% 0.117 46.1), rgb(179, 99, 59).
Aa
Black text reads best on this color (4.76:1).
About this color
#B3633B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.117 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Copper (#B66325), ΔE 0.020 away. Black text reads best on it, at 4.76:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.117) |
| Temperature | warm |
| Nearest name | Copper (#B66325) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #B3633B |
| RGB | rgb(179, 99, 59) |
| HSL | hsl(20, 50%, 47%) |
| OKLCH | oklch(58.4% 0.117 46.1) |
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 #B3633B | 4.40:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #B3633B | 4.76:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #B3633B text on white | 4.40:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #B3633B text on black | 4.76:1 | AA | Lc -31.5 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F3E7E2
oklch(93.6% 0.015 44.2)
-
Step 200
200
#EBD4C9
oklch(88.6% 0.03 47.3)
-
Step 300
300
#DEB7A5
oklch(80.9% 0.052 46.1)
-
Step 400
400
#CD9074
oklch(70.7% 0.084 45.6)
-
Step 500
500
#BF744F
oklch(63.2% 0.108 46.4)
-
Step 600
600 (this color)
#B3633B
oklch(58.4% 0.117 46.1)
-
Step 700
700
#924A25
oklch(49.1% 0.109 45.9)
-
Step 800
800
#763D20
oklch(42.6% 0.09 46.1)
-
Step 900
900
#603520
oklch(37.8% 0.07 46)
-
Step 950
950
#381F13
oklch(26.9% 0.044 46)
#B3633B 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) | #796D37 | 0.104 |
| Deuteranopia (no green cones) | #8C7F3A | 0.096 |
| Tritanopia (no blue cones) | #C3535A | 0.067 |
| Achromatopsia (no color) | #787878 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B3633B
#B3633B
oklch(58.4% 0.117 46.1)
- #0088AE
#0088AE
oklch(58.4% 0.112 226.2)
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 #B3633B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Copper #B66325 ΔE 0.020
- Clay #B66A50 ΔE 0.026
- Earth #A2653E ΔE 0.030
- Adobe #BD6C48 ΔE 0.031
- Clay Brown #B2713D ΔE 0.034
- Orangey Brown #B16002 ΔE 0.035
- Umber #B26400 ΔE 0.037
- Tiger's Eye #BC6C25 ΔE 0.038
Use #B3633B 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.