#CB511A
Closest named color: Rust Orange (#C45508). oklch(58.9% 0.167 41.1), rgb(203, 81, 26).
Aa
Black text reads best on this color (4.73:1).
About this color
#CB511A is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.167 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.018 away. Black text reads best on it, at 4.73:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #CB511A |
| RGB | rgb(203, 81, 26) |
| HSL | hsl(19, 77%, 45%) |
| OKLCH | oklch(58.9% 0.167 41.1) |
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 #CB511A | 4.43:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #CB511A | 4.73:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #CB511A text on white | 4.43:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #CB511A text on black | 4.73:1 | AA | Lc -31.7 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F3D1C4
oklch(88.6% 0.042 42.1)
-
Step 300
300
#ECB19B
oklch(80.9% 0.076 41.4)
-
Step 400
400
#DF8664
oklch(70.7% 0.12 41.5)
-
Step 500
500
#D46337
oklch(63% 0.154 40.8)
-
Step 600
600 (this color)
#CB511A
oklch(58.9% 0.167 41.1)
-
Step 700
700
#A33900
oklch(49.1% 0.151 41.1)
-
Step 800
800
#862F03
oklch(42.8% 0.129 41.3)
-
Step 900
900
#6C2B10
oklch(37.8% 0.1 41.1)
-
Step 950
950
#3F1A0B
oklch(26.9% 0.063 41.6)
#CB511A 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) | #74660F | 0.164 |
| Deuteranopia (no green cones) | #928213 | 0.148 |
| Tritanopia (no blue cones) | #DF3147 | 0.079 |
| Achromatopsia (no color) | #787878 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB511A
#CB511A
oklch(58.9% 0.167 41.1)
- #008BAA
#008BAA
oklch(59% 0.108 220.9)
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 #CB511A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.018
- Rusty Orange #CD5909 ΔE 0.020
- Burnt Orange #C04E01 ΔE 0.025
- Brick Orange #C14A09 ΔE 0.026
- Deep Orange #DC4D01 ΔE 0.032
- Terra Cotta #C9643B ΔE 0.039
- Burnt Siena #B75203 ΔE 0.040
- Terracotta #CA6641 ΔE 0.045
Use #CB511A 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.