#D3370B
Closest named color: Brick Orange (#C14A09). oklch(57.2% 0.198 34.4), rgb(211, 55, 11).
Aa
White text reads best on this color (4.85:1).
About this color
#D3370B is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.198 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Brick Orange (#C14A09), ΔE 0.042 away. White text reads best on it, at 4.85:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Brick Orange (#C14A09) |
| Black text | 4.32:1 |
| White text | 4.85:1 |
Values
| HEX | #D3370B |
| RGB | rgb(211, 55, 11) |
| HSL | hsl(13, 90%, 44%) |
| OKLCH | oklch(57.2% 0.198 34.4) |
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 #D3370B | 4.85:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #D3370B | 4.32:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #D3370B text on white | 4.85:1 | AA | Lc 72.2 | Content text, not long reading |
| #D3370B text on black | 4.32:1 | AA large text | Lc -29.5 | 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
#FBE4DF
oklch(93.6% 0.026 32.2)
-
Step 200
200
#F8CEC4
oklch(88.5% 0.05 33.6)
-
Step 300
300
#F4AC9A
oklch(80.8% 0.089 34.6)
-
Step 400
400
#EB7C62
oklch(70.6% 0.143 34.3)
-
Step 500
500
#E25434
oklch(63.1% 0.183 34.2)
-
Step 600
600 (this color)
#D3370B
oklch(57.2% 0.198 34.4)
-
Step 700
700
#AE2800
oklch(49.2% 0.175 34.4)
-
Step 800
800
#8F1F00
oklch(42.6% 0.152 34.4)
-
Step 900
900
#73210E
oklch(37.6% 0.119 34.2)
-
Step 950
950
#44150A
oklch(27% 0.075 34.5)
#D3370B 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) | #685B00 | 0.208 |
| Deuteranopia (no green cones) | #8E7E00 | 0.187 |
| Tritanopia (no blue cones) | #E90031 | 0.061 |
| Achromatopsia (no color) | #717171 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D3370B
#D3370B
oklch(57.2% 0.198 34.4)
- #00879C
#00879C
oklch(57.3% 0.101 213.6)
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 #D3370B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Orange #C14A09 ΔE 0.042
- Deep Orange #DC4D01 ΔE 0.043
- Sinopia #BB3E03 ΔE 0.047
- Tomato Red #EC2D01 ΔE 0.048
- Burnt Orange #C04E01 ΔE 0.049
- Faded Red #D3494E ΔE 0.053
- Rust Orange #C45508 ΔE 0.054
- Dark Coral #CF524E ΔE 0.057
Use #D3370B 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.