#CA501B
Closest named color: Rust Orange (#C45508). oklch(58.6% 0.167 40.7), rgb(202, 80, 27).
Aa
Black text reads best on this color (4.67:1).
About this color
#CA501B 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 4.67:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #CA501B |
| RGB | rgb(202, 80, 27) |
| HSL | hsl(18, 76%, 45%) |
| OKLCH | oklch(58.6% 0.167 40.7) |
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 #CA501B | 4.49:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #CA501B | 4.67:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #CA501B text on white | 4.49:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #CA501B text on black | 4.67:1 | AA | Lc -31.4 | 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 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
#F3D1C5
oklch(88.6% 0.042 40.4)
-
Step 300
300
#ECB19C
oklch(81% 0.075 40.5)
-
Step 400
400
#E08565
oklch(70.7% 0.121 40)
-
Step 500
500
#D46338
oklch(63% 0.154 40.5)
-
Step 600
600 (this color)
#CA501B
oklch(58.6% 0.167 40.7)
-
Step 700
700
#A43800
oklch(49.1% 0.153 40.5)
-
Step 800
800
#862F05
oklch(42.8% 0.128 40.9)
-
Step 900
900
#6C2B10
oklch(37.8% 0.1 41.1)
-
Step 950
950
#3F1A0C
oklch(26.9% 0.063 40.6)
#CA501B 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) | #736610 | 0.164 |
| Deuteranopia (no green cones) | #918114 | 0.148 |
| Tritanopia (no blue cones) | #DE3046 | 0.078 |
| Achromatopsia (no color) | #777777 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CA501B
#CA501B
oklch(58.6% 0.167 40.7)
- #008AA8
#008AA8
oklch(58.6% 0.107 220.3)
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 #CA501B, 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 0.023
- Burnt Orange #C04E01 ΔE 0.023
- Brick Orange #C14A09 ΔE 0.023
- Deep Orange #DC4D01 ΔE 0.034
- Burnt Siena #B75203 ΔE 0.039
- Terra Cotta #C9643B ΔE 0.041
- Terracotta #CA6641 ΔE 0.046
Use #CA501B 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.