#C33503
Closest named color: Sinopia (#BB3E03). oklch(54.2% 0.185 35.7), rgb(195, 53, 3).
Aa
White text reads best on this color (5.48:1).
About this color
#C33503 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.185 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.019 away. White text reads best on it, at 5.48:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.83:1 |
| White text | 5.48:1 |
Values
| HEX | #C33503 |
| RGB | rgb(195, 53, 3) |
| HSL | hsl(16, 97%, 39%) |
| OKLCH | oklch(54.2% 0.185 35.7) |
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 #C33503 | 5.48:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #C33503 | 3.83:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #C33503 text on white | 5.48:1 | AA | Lc 76.0 | Fine for body text |
| #C33503 text on black | 3.83:1 | AA large text | Lc -25.8 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC5
oklch(88.5% 0.046 34.7)
-
Step 300
300
#F1AE9C
oklch(80.9% 0.083 35.6)
-
Step 400
400
#E78065
oklch(70.8% 0.133 35.6)
-
Step 500
500
#DC5A38
oklch(63% 0.17 35.6)
-
Step 600
600 (this color)
#C33503
oklch(54.2% 0.185 35.7)
-
Step 700
700
#AB2C00
oklch(49% 0.169 35.7)
-
Step 800
800
#8C2605
oklch(42.8% 0.142 35.9)
-
Step 900
900
#712511
oklch(37.8% 0.112 35.4)
-
Step 950
950
#42170C
oklch(27% 0.07 35.4)
#C33503 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) | #615500 | 0.192 |
| Deuteranopia (no green cones) | #847500 | 0.172 |
| Tritanopia (no blue cones) | #D7002E | 0.062 |
| Achromatopsia (no color) | #696969 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C33503
#C33503
oklch(54.2% 0.185 35.7)
- #007D93
#007D93
oklch(54.3% 0.096 215.8)
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 #C33503, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.019
- Brick Orange #C14A09 ΔE 0.035
- Dull Red #BB3F3F ΔE 0.043
- Burnt Orange #C04E01 ΔE 0.043
- Rusty Red #AF2F0D ΔE 0.044
- Burnt Siena #B75203 ΔE 0.053
- Scarlet #BE0119 ΔE 0.053
- Firebrick #B22222 ΔE 0.054
Use #C33503 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.