#C03B07
Closest named color: Sinopia (#BB3E03). oklch(54.3% 0.177 37.2), rgb(192, 59, 7).
Aa
White text reads best on this color (5.42:1).
About this color
#C03B07 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.177 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.011 away. White text reads best on it, at 5.42:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.86:1 |
| White text | 5.42:1 |
Values
| HEX | #C03B07 |
| RGB | rgb(192, 59, 7) |
| HSL | hsl(17, 93%, 39%) |
| OKLCH | oklch(54.3% 0.177 37.2) |
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 #C03B07 | 5.42:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #C03B07 | 3.86:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #C03B07 text on white | 5.42:1 | AA | Lc 75.8 | Fine for body text |
| #C03B07 text on black | 3.86:1 | AA large text | Lc -25.9 | Dividers and decoration only |
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
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F5D0C5
oklch(88.6% 0.045 37.2)
-
Step 300
300
#EFAF9C
oklch(80.9% 0.08 37.2)
-
Step 400
400
#E48265
oklch(70.7% 0.128 37.3)
-
Step 500
500
#D95E39
oklch(63.1% 0.163 37.2)
-
Step 600
600 (this color)
#C03B07
oklch(54.3% 0.177 37.2)
-
Step 700
700
#A93100
oklch(49.2% 0.163 37.3)
-
Step 800
800
#892907
oklch(42.6% 0.136 37.1)
-
Step 900
900
#6F2812
oklch(37.8% 0.106 37.3)
-
Step 950
950
#41180C
oklch(26.9% 0.067 37)
#C03B07 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) | #635700 | 0.181 |
| Deuteranopia (no green cones) | #847500 | 0.163 |
| Tritanopia (no blue cones) | #D40033 | 0.071 |
| Achromatopsia (no color) | #6A6A6A | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03B07
#C03B07
oklch(54.3% 0.177 37.2)
- #007D94
#007D94
oklch(54.4% 0.097 216.6)
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 #C03B07, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.011
- Brick Orange #C14A09 ΔE 0.027
- Burnt Orange #C04E01 ΔE 0.035
- Dull Red #BB3F3F ΔE 0.042
- Rusty Red #AF2F0D ΔE 0.044
- Burnt Siena #B75203 ΔE 0.044
- Cinnamon #AC4F06 ΔE 0.050
- Rust Orange #C45508 ΔE 0.051
Use #C03B07 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.