#CB551C
Closest named color: Rusty Orange (#CD5909). oklch(59.4% 0.164 42.4), rgb(203, 85, 28).
Aa
Black text reads best on this color (4.85:1).
About this color
#CB551C is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.164 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Orange (#CD5909), ΔE 0.014 away. Black text reads best on it, at 4.85:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Rusty Orange (#CD5909) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #CB551C |
| RGB | rgb(203, 85, 28) |
| HSL | hsl(20, 76%, 45%) |
| OKLCH | oklch(59.4% 0.164 42.4) |
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 #CB551C | 4.32:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #CB551C | 4.85:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #CB551C text on white | 4.32:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #CB551C text on black | 4.85:1 | AA | Lc -32.5 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DE
oklch(93.5% 0.023 41.4)
-
Step 200
200
#F4D0C2
oklch(88.4% 0.045 42.4)
-
Step 300
300
#EEB098
oklch(80.9% 0.08 42.1)
-
Step 400
400
#E3845D
oklch(70.8% 0.129 42.7)
-
Step 500
500 (this color)
#CB551C
oklch(59.4% 0.164 42.4)
-
Step 600
600
#BF4800
oklch(55.7% 0.166 42.5)
-
Step 700
700
#A13B00
oklch(49% 0.147 42.3)
-
Step 800
800
#853000
oklch(42.7% 0.127 42.7)
-
Step 900
900
#6E2907
oklch(37.7% 0.107 42.3)
-
Step 950
950
#411908
oklch(27.1% 0.068 42)
#CB551C 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) | #776911 | 0.157 |
| Deuteranopia (no green cones) | #948416 | 0.143 |
| Tritanopia (no blue cones) | #DF384A | 0.080 |
| Achromatopsia (no color) | #797979 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB551C
#CB551C
oklch(59.4% 0.164 42.4)
- #008CAE
#008CAE
oklch(59.4% 0.111 222.9)
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 #CB551C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Orange #CD5909 ΔE 0.014
- Rust Orange #C45508 ΔE 0.017
- Burnt Orange #C04E01 ΔE 0.029
- Brick Orange #C14A09 ΔE 0.032
- Deep Orange #DC4D01 ΔE 0.032
- Terra Cotta #C9643B ΔE 0.032
- Terracotta #CA6641 ΔE 0.038
- Burnt Siena #B75203 ΔE 0.042
Use #CB551C 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.