#CF501A
Closest named color: Rusty Orange (#CD5909). oklch(59.4% 0.172 40.2), rgb(207, 80, 26).
Aa
Black text reads best on this color (4.81:1).
About this color
#CF501A is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.172 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Orange (#CD5909), ΔE 0.021 away. Black text reads best on it, at 4.81:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Rusty Orange (#CD5909) |
| Black text | 4.81:1 |
| White text | 4.36:1 |
Values
| HEX | #CF501A |
| RGB | rgb(207, 80, 26) |
| HSL | hsl(18, 78%, 46%) |
| OKLCH | oklch(59.4% 0.172 40.2) |
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 #CF501A | 4.36:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #CF501A | 4.81:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #CF501A text on white | 4.36:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #CF501A 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
#F6D0C2
oklch(88.6% 0.047 41.3)
-
Step 300
300
#F1AF97
oklch(81% 0.085 40.8)
-
Step 400
400
#E6815D
oklch(70.7% 0.134 40.2)
-
Step 500
500 (this color)
#CF501A
oklch(59.4% 0.172 40.2)
-
Step 600
600
#C24300
oklch(55.5% 0.173 40.3)
-
Step 700
700
#A43700
oklch(49% 0.153 40.1)
-
Step 800
800
#882C00
oklch(42.7% 0.134 40.1)
-
Step 900
900
#702606
oklch(37.6% 0.112 40.1)
-
Step 950
950
#421707
oklch(26.9% 0.072 39.9)
#CF501A 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) | #75670F | 0.170 |
| Deuteranopia (no green cones) | #948412 | 0.155 |
| Tritanopia (no blue cones) | #E42E46 | 0.079 |
| Achromatopsia (no color) | #797979 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CF501A
#CF501A
oklch(59.4% 0.172 40.2)
- #008DAB
#008DAB
oklch(59.5% 0.108 219.9)
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 #CF501A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Orange #CD5909 ΔE 0.021
- Deep Orange #DC4D01 ΔE 0.024
- Rust Orange #C45508 ΔE 0.024
- Burnt Orange #C04E01 ΔE 0.032
- Brick Orange #C14A09 ΔE 0.032
- Terra Cotta #C9643B ΔE 0.040
- Terracotta #CA6641 ΔE 0.045
- Dark Coral #CF524E ΔE 0.047
Use #CF501A 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.