#C83700
Closest named color: Sinopia (#BB3E03). oklch(55.3% 0.189 36.1), rgb(200, 55, 0).
Aa
White text reads best on this color (5.24:1).
About this color
#C83700 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.189 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.026 away. White text reads best on it, at 5.24:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.189) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #C83700 |
| RGB | rgb(200, 55, 0) |
| HSL | hsl(17, 100%, 39%) |
| OKLCH | oklch(55.3% 0.189 36.1) |
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 #C83700 | 5.24:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #C83700 | 4.00:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #C83700 text on white | 5.24:1 | AA | Lc 74.6 | Content text, not long reading |
| #C83700 text on black | 4.00:1 | AA large text | Lc -27.1 | 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
#FAE5DF
oklch(93.7% 0.025 36.5)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F2AE9B
oklch(81% 0.085 36.2)
-
Step 400
400
#E87F63
oklch(70.7% 0.136 35.9)
-
Step 500
500
#DE5935
oklch(63.1% 0.174 35.9)
-
Step 600
600 (this color)
#C83700
oklch(55.3% 0.189 36.1)
-
Step 700
700
#AB2E00
oklch(49.2% 0.168 36.2)
-
Step 800
800
#8D2401
oklch(42.7% 0.146 35.9)
-
Step 900
900
#71240E
oklch(37.6% 0.114 36.1)
-
Step 950
950
#43170B
oklch(27.1% 0.072 36.1)
#C83700 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) | #645700 | 0.195 |
| Deuteranopia (no green cones) | #887800 | 0.174 |
| Tritanopia (no blue cones) | #DD0030 | 0.065 |
| Achromatopsia (no color) | #6C6C6C | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C83700
#C83700
oklch(55.3% 0.189 36.1)
- #008097
#008097
oklch(55.3% 0.098 216.2)
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 #C83700, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.026
- Brick Orange #C14A09 ΔE 0.031
- Burnt Orange #C04E01 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.047
- Rust Orange #C45508 ΔE 0.052
- Burnt Siena #B75203 ΔE 0.053
- Rusty Red #AF2F0D ΔE 0.055
- Deep Orange #DC4D01 ΔE 0.059
Use #C83700 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.