#CB631D
Closest named color: Rust (#CA6702). oklch(61.5% 0.153 49), rgb(203, 99, 29).
Aa
Black text reads best on this color (5.34:1).
About this color
#CB631D is a medium-dark, vivid orange. In OKLCH its lightness is 61%, its chroma 0.153 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Rust (#CA6702), ΔE 0.015 away. Black text reads best on it, at 5.34:1.
| Hue family | Oranges |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Rust (#CA6702) |
| Black text | 5.34:1 |
| White text | 3.93:1 |
Values
| HEX | #CB631D |
| RGB | rgb(203, 99, 29) |
| HSL | hsl(24, 75%, 45%) |
| OKLCH | oklch(61.5% 0.153 49) |
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 #CB631D | 3.93:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #CB631D | 5.34:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #CB631D text on white | 3.93:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #CB631D text on black | 5.34:1 | AA | Lc -35.6 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F7E6DE
oklch(93.6% 0.022 47)
-
Step 200
200
#F1D2C2
oklch(88.5% 0.041 49)
-
Step 300
300
#E9B396
oklch(80.9% 0.075 49.5)
-
Step 400
400
#DC895B
oklch(70.7% 0.119 49)
-
Step 500
500 (this color)
#CB631D
oklch(61.5% 0.153 49)
-
Step 600
600
#B65200
oklch(55.7% 0.149 48.9)
-
Step 700
700
#9A4400
oklch(49.2% 0.132 48.7)
-
Step 800
800
#7F3700
oklch(42.8% 0.115 48.9)
-
Step 900
900
#6A2E02
oklch(37.8% 0.099 49.3)
-
Step 950
950
#3E1B06
oklch(26.9% 0.063 48.6)
#CB631D 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) | #81720F | 0.136 |
| Deuteranopia (no green cones) | #9A891A | 0.122 |
| Tritanopia (no blue cones) | #DF4B56 | 0.089 |
| Achromatopsia (no color) | #808080 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB631D
#CB631D
oklch(61.5% 0.153 49)
- #0091BE
#0091BE
oklch(61.4% 0.121 229.1)
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 #CB631D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust #CA6702 ΔE 0.015
- Rusty Orange #CD5909 ΔE 0.020
- Chocolate #D2691E ΔE 0.020
- Terra Cotta #C9643B ΔE 0.022
- Browny Orange #CA6B02 ΔE 0.023
- Terracotta #CA6641 ΔE 0.027
- Orange Brown #BE6400 ΔE 0.028
- Terracota #CB6843 ΔE 0.029
Use #CB631D 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.