#C66738
Closest named color: Terra Cotta (#C9643B). oklch(61.6% 0.136 45.3), rgb(198, 103, 56).
Aa
Black text reads best on this color (5.39:1).
About this color
#C66738 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 62%, its chroma 0.136 and its hue 45°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.010 away. Black text reads best on it, at 5.39:1.
| Hue family | Browns |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.136) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #C66738 |
| RGB | rgb(198, 103, 56) |
| HSL | hsl(20, 56%, 50%) |
| OKLCH | oklch(61.6% 0.136 45.3) |
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 #C66738 | 3.89:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #C66738 | 5.39:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #C66738 text on white | 3.89:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #C66738 text on black | 5.39:1 | AA | Lc -35.8 | 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 500.
-
Step 50
50
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F6E6DF
oklch(93.6% 0.02 45.3)
-
Step 200
200
#EFD2C5
oklch(88.4% 0.037 45.6)
-
Step 300
300
#E6B49D
oklch(80.9% 0.067 45.9)
-
Step 400
400
#D78B67
oklch(70.7% 0.106 45.9)
-
Step 500
500 (this color)
#C66738
oklch(61.6% 0.136 45.3)
-
Step 600
600
#B65116
oklch(55.6% 0.147 45.6)
-
Step 700
700
#9D4105
oklch(49.2% 0.137 45.5)
-
Step 800
800
#7F360C
oklch(42.7% 0.113 45.3)
-
Step 900
900
#673014
oklch(37.8% 0.088 45.3)
-
Step 950
950
#3C1C0D
oklch(26.8% 0.056 44.7)
#C66738 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) | #817433 | 0.123 |
| Deuteranopia (no green cones) | #988936 | 0.112 |
| Tritanopia (no blue cones) | #D9545D | 0.075 |
| Achromatopsia (no color) | #818181 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C66738
#C66738
oklch(61.6% 0.136 45.3)
- #0093BA
#0093BA
oklch(61.7% 0.117 225.1)
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 #C66738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.010
- Terracotta #CA6641 ΔE 0.013
- Terracota #CB6843 ΔE 0.015
- Adobe #BD6C48 ΔE 0.021
- Tiger's Eye #BC6C25 ΔE 0.029
- Chocolate #D2691E ΔE 0.029
- Rust #CA6702 ΔE 0.029
- Rusty Orange #CD5909 ΔE 0.033
Use #C66738 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.