#C15539
Closest named color: Rust Orange (#C45508). oklch(58.2% 0.145 35.6), rgb(193, 85, 57).
Aa
Black text reads best on this color (4.62:1).
About this color
#C15539 is a medium-dark, vivid red. In OKLCH its lightness is 58%, its chroma 0.145 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.032 away. Black text reads best on it, at 4.62:1.
| Hue family | Reds |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.145) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #C15539 |
| RGB | rgb(193, 85, 57) |
| HSL | hsl(12, 54%, 49%) |
| OKLCH | oklch(58.2% 0.145 35.6) |
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 #C15539 | 4.53:1 | AA | Lc -76.4 | Fine for body text |
| Black text on #C15539 | 4.62:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #C15539 text on white | 4.53:1 | AA | Lc 70.9 | Content text, not long reading |
| #C15539 text on black | 4.62:1 | AA | Lc -30.8 | 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
#FBF3F1
oklch(97% 0.009 34.3)
-
Step 100
100
#F6E6E1
oklch(93.6% 0.019 38.1)
-
Step 200
200
#F0D1C9
oklch(88.4% 0.037 34.8)
-
Step 300
300
#E7B2A4
oklch(80.8% 0.065 35.3)
-
Step 400
400
#D98873
oklch(70.6% 0.105 35.3)
-
Step 500
500
#CD684E
oklch(63.1% 0.134 35.5)
-
Step 600
600 (this color)
#C15539
oklch(58.2% 0.145 35.6)
-
Step 700
700
#9E3D24
oklch(49% 0.135 35.5)
-
Step 800
800
#81331F
oklch(42.7% 0.113 35.5)
-
Step 900
900
#682E1F
oklch(37.8% 0.087 35.6)
-
Step 950
950
#3D1B13
oklch(26.9% 0.056 34.4)
#C15539 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) | #726736 | 0.145 |
| Deuteranopia (no green cones) | #8D7F36 | 0.133 |
| Tritanopia (no blue cones) | #D43E4F | 0.063 |
| Achromatopsia (no color) | #767676 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C15539
#C15539
oklch(58.2% 0.145 35.6)
- #0089A1
#0089A1
oklch(58% 0.103 215.8)
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 #C15539, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.032
- Brick Orange #C14A09 ΔE 0.033
- Burnt Orange #C04E01 ΔE 0.033
- Dark Coral #CF524E ΔE 0.038
- Terra Cotta #C9643B ΔE 0.038
- Burnt Siena #B75203 ΔE 0.041
- Rusty Orange #CD5909 ΔE 0.041
- Terracotta #CA6641 ΔE 0.042
Use #C15539 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.