#CE511B
Closest named color: Rusty Orange (#CD5909). oklch(59.4% 0.17 40.5), rgb(206, 81, 27).
Aa
Black text reads best on this color (4.81:1).
About this color
#CE511B is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.170 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Orange (#CD5909), ΔE 0.019 away. Black text reads best on it, at 4.81:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Rusty Orange (#CD5909) |
| Black text | 4.81:1 |
| White text | 4.35:1 |
Values
| HEX | #CE511B |
| RGB | rgb(206, 81, 27) |
| HSL | hsl(18, 77%, 46%) |
| OKLCH | oklch(59.4% 0.17 40.5) |
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 #CE511B | 4.35:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #CE511B | 4.81:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #CE511B text on white | 4.35:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #CE511B text on black | 4.81:1 | AA | Lc -32.4 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DE
oklch(93.6% 0.024 40.3)
-
Step 200
200
#F5D0C2
oklch(88.5% 0.046 41.8)
-
Step 300
300
#F0AF98
oklch(80.9% 0.083 40.3)
-
Step 400
400
#E6825D
oklch(70.8% 0.134 40.8)
-
Step 500
500 (this color)
#CE511B
oklch(59.4% 0.17 40.5)
-
Step 600
600
#C24400
oklch(55.7% 0.173 40.6)
-
Step 700
700
#A43800
oklch(49.1% 0.153 40.5)
-
Step 800
800
#872D00
oklch(42.7% 0.132 40.7)
-
Step 900
900
#702706
oklch(37.8% 0.111 40.7)
-
Step 950
950
#421807
oklch(27.1% 0.071 41.1)
#CE511B 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) | #756710 | 0.167 |
| Deuteranopia (no green cones) | #948314 | 0.150 |
| Tritanopia (no blue cones) | #E33047 | 0.079 |
| Achromatopsia (no color) | #797979 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CE511B
#CE511B
oklch(59.4% 0.17 40.5)
- #008CAB
#008CAB
oklch(59.3% 0.108 220.8)
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 #CE511B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Orange #CD5909 ΔE 0.019
- Rust Orange #C45508 ΔE 0.023
- Deep Orange #DC4D01 ΔE 0.026
- Burnt Orange #C04E01 ΔE 0.031
- Brick Orange #C14A09 ΔE 0.031
- Terra Cotta #C9643B ΔE 0.038
- Terracotta #CA6641 ΔE 0.043
- Burnt Siena #B75203 ΔE 0.046
Use #CE511B 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.