#CB5129
Closest named color: Rust Orange (#C45508). oklch(59% 0.164 37.9), rgb(203, 81, 41).
Aa
Black text reads best on this color (4.74:1).
About this color
#CB5129 is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.164 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.025 away. Black text reads best on it, at 4.74:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #CB5129 |
| RGB | rgb(203, 81, 41) |
| HSL | hsl(15, 66%, 48%) |
| OKLCH | oklch(59% 0.164 37.9) |
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 #CB5129 | 4.42:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #CB5129 | 4.74:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #CB5129 text on white | 4.42:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #CB5129 text on black | 4.74:1 | AA | Lc -31.8 | 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 600.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D0C6
oklch(88.4% 0.042 36.5)
-
Step 300
300
#ECB19E
oklch(81% 0.074 38.6)
-
Step 400
400
#DF8569
oklch(70.6% 0.118 38)
-
Step 500
500
#D46340
oklch(63.1% 0.151 37.8)
-
Step 600
600 (this color)
#CB5129
oklch(59% 0.164 37.9)
-
Step 700
700
#A5360D
oklch(49.1% 0.154 37.7)
-
Step 800
800
#862E10
oklch(42.7% 0.127 37.7)
-
Step 900
900
#6C2B16
oklch(37.8% 0.099 38.1)
-
Step 950
950
#3F1A0E
oklch(27% 0.062 38.5)
#CB5129 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) | #736723 | 0.164 |
| Deuteranopia (no green cones) | #918224 | 0.150 |
| Tritanopia (no blue cones) | #DF3349 | 0.072 |
| Achromatopsia (no color) | #787878 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB5129
#CB5129
oklch(59% 0.164 37.9)
- #008CA7
#008CA7
oklch(59.1% 0.106 217.8)
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 #CB5129, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.025
- Rusty Orange #CD5909 ΔE 0.027
- Brick Orange #C14A09 ΔE 0.030
- Burnt Orange #C04E01 ΔE 0.031
- Deep Orange #DC4D01 ΔE 0.034
- Terra Cotta #C9643B ΔE 0.037
- Dark Coral #CF524E ΔE 0.039
- Terracotta #CA6641 ΔE 0.042
Use #CB5129 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.