#CB5311
Closest named color: Rust Orange (#C45508). oklch(59.1% 0.167 43.3), rgb(203, 83, 17).
Aa
Black text reads best on this color (4.78:1).
About this color
#CB5311 is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.167 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.014 away. Black text reads best on it, at 4.78:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #CB5311 |
| RGB | rgb(203, 83, 17) |
| HSL | hsl(21, 85%, 43%) |
| OKLCH | oklch(59.1% 0.167 43.3) |
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 #CB5311 | 4.38:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #CB5311 | 4.78:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #CB5311 text on white | 4.38:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #CB5311 text on black | 4.78:1 | AA | Lc -32.1 | 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
#F7E6DE
oklch(93.6% 0.022 47)
-
Step 200
200
#F2D1C3
oklch(88.5% 0.042 44.3)
-
Step 300
300
#EBB19A
oklch(80.8% 0.075 42.6)
-
Step 400
400
#DF8661
oklch(70.7% 0.121 43)
-
Step 500
500
#D36532
oklch(63.1% 0.153 43.5)
-
Step 600
600 (this color)
#CB5311
oklch(59.1% 0.167 43.3)
-
Step 700
700
#A03D00
oklch(49.1% 0.144 43.5)
-
Step 800
800
#843100
oklch(42.7% 0.125 43.5)
-
Step 900
900
#6B2B0C
oklch(37.6% 0.1 43)
-
Step 950
950
#3F1A0A
oklch(26.9% 0.063 42.6)
#CB5311 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) | #766700 | 0.160 |
| Deuteranopia (no green cones) | #938307 | 0.146 |
| Tritanopia (no blue cones) | #E03448 | 0.084 |
| Achromatopsia (no color) | #787878 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB5311
#CB5311
oklch(59.1% 0.167 43.3)
- #008BAD
#008BAD
oklch(59.1% 0.11 223)
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 #CB5311, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.014
- Rusty Orange #CD5909 ΔE 0.014
- Burnt Orange #C04E01 ΔE 0.026
- Brick Orange #C14A09 ΔE 0.028
- Deep Orange #DC4D01 ΔE 0.032
- Terra Cotta #C9643B ΔE 0.037
- Burnt Siena #B75203 ΔE 0.040
- Orange Brown #BE6400 ΔE 0.043
Use #CB5311 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.