#C66536
Closest named color: Terra Cotta (#C9643B). oklch(61.3% 0.138 44.8), rgb(198, 101, 54).
Aa
Black text reads best on this color (5.31:1).
About this color
#C66536 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 61%, its chroma 0.138 and its hue 45°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.008 away. Black text reads best on it, at 5.31:1.
| Hue family | Browns |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.138) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 5.31:1 |
| White text | 3.95:1 |
Values
| HEX | #C66536 |
| RGB | rgb(198, 101, 54) |
| HSL | hsl(20, 57%, 49%) |
| OKLCH | oklch(61.3% 0.138 44.8) |
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 #C66536 | 3.95:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #C66536 | 5.31:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #C66536 text on white | 3.95:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #C66536 text on black | 5.31:1 | AA | Lc -35.3 | 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
#F0D2C5
oklch(88.5% 0.038 44.8)
-
Step 300
300
#E7B39D
oklch(80.8% 0.068 44)
-
Step 400
400
#D98A67
oklch(70.7% 0.109 44.5)
-
Step 500
500 (this color)
#C66536
oklch(61.3% 0.138 44.8)
-
Step 600
600
#B85014
oklch(55.7% 0.15 45)
-
Step 700
700
#9E3F03
oklch(49.1% 0.14 44.5)
-
Step 800
800
#80350A
oklch(42.7% 0.115 44.8)
-
Step 900
900
#672F13
oklch(37.6% 0.09 44.8)
-
Step 950
950
#3D1C0D
oklch(27% 0.057 44)
#C66536 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) | #807331 | 0.126 |
| Deuteranopia (no green cones) | #978834 | 0.115 |
| Tritanopia (no blue cones) | #D9515B | 0.075 |
| Achromatopsia (no color) | #808080 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C66536
#C66536
oklch(61.3% 0.138 44.8)
- #0092B8
#0092B8
oklch(61.4% 0.116 224.6)
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 #C66536, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.008
- Terracotta #CA6641 ΔE 0.013
- Terracota #CB6843 ΔE 0.017
- Adobe #BD6C48 ΔE 0.023
- Rust #CA6702 ΔE 0.030
- Rusty Orange #CD5909 ΔE 0.030
- Tiger's Eye #BC6C25 ΔE 0.031
- Chocolate #D2691E ΔE 0.031
Use #C66536 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.