#C33F28
Closest named color: Sinopia (#BB3E03). oklch(55.5% 0.172 32.3), rgb(195, 63, 40).
Aa
White text reads best on this color (5.16:1).
About this color
#C33F28 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.172 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.027 away. White text reads best on it, at 5.16:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #C33F28 |
| RGB | rgb(195, 63, 40) |
| HSL | hsl(9, 66%, 46%) |
| OKLCH | oklch(55.5% 0.172 32.3) |
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 #C33F28 | 5.16:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #C33F28 | 4.06:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #C33F28 text on white | 5.16:1 | AA | Lc 74.5 | Content text, not long reading |
| #C33F28 text on black | 4.06:1 | AA large text | Lc -27.2 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F9E5E1
oklch(93.7% 0.023 31.1)
-
Step 200
200
#F4CFC7
oklch(88.4% 0.043 32.2)
-
Step 300
300
#EEAFA1
oklch(80.9% 0.077 32.9)
-
Step 400
400
#E3826E
oklch(70.7% 0.124 32.6)
-
Step 500
500
#D85E47
oklch(63.1% 0.159 32.5)
-
Step 600
600 (this color)
#C33F28
oklch(55.5% 0.172 32.3)
-
Step 700
700
#A8301B
oklch(49% 0.16 32.3)
-
Step 800
800
#892A19
oklch(42.8% 0.132 32.5)
-
Step 900
900
#6E271B
oklch(37.6% 0.104 31.8)
-
Step 950
950
#411811
oklch(27% 0.066 31.5)
#C33F28 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) | #655B24 | 0.180 |
| Deuteranopia (no green cones) | #867822 | 0.164 |
| Tritanopia (no blue cones) | #D7133B | 0.063 |
| Achromatopsia (no color) | #6D6D6D | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C33F28
#C33F28
oklch(55.5% 0.172 32.3)
- #008194
#008194
oklch(55.4% 0.097 212.6)
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 #C33F28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.027
- Dull Red #BB3F3F ΔE 0.029
- Brick Orange #C14A09 ΔE 0.031
- Burnt Orange #C04E01 ΔE 0.039
- Dusty Red #B9484E ΔE 0.043
- Burnt Siena #B75203 ΔE 0.050
- Rust Orange #C45508 ΔE 0.051
- Faded Red #D3494E ΔE 0.053
Use #C33F28 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.