#C43019
Closest named color: Sinopia (#BB3E03). oklch(54% 0.188 31.7), rgb(196, 48, 25).
Aa
White text reads best on this color (5.54:1).
About this color
#C43019 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.188 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.029 away. White text reads best on it, at 5.54:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #C43019 |
| RGB | rgb(196, 48, 25) |
| HSL | hsl(8, 77%, 43%) |
| OKLCH | oklch(54% 0.188 31.7) |
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 #C43019 | 5.54:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #C43019 | 3.78:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #C43019 text on white | 5.54:1 | AA | Lc 76.2 | Fine for body text |
| #C43019 text on black | 3.78:1 | AA large text | Lc -25.5 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC6
oklch(88.4% 0.048 30.9)
-
Step 300
300
#F2AD9F
oklch(80.9% 0.084 31.8)
-
Step 400
400
#E87E6A
oklch(70.7% 0.135 31.8)
-
Step 500
500
#DE5841
oklch(63.1% 0.172 31.9)
-
Step 600
600 (this color)
#C43019
oklch(54% 0.188 31.7)
-
Step 700
700
#AE2611
oklch(49.1% 0.175 31.6)
-
Step 800
800
#8D2312
oklch(42.7% 0.144 31.9)
-
Step 900
900
#712317
oklch(37.6% 0.113 31.4)
-
Step 950
950
#43160F
oklch(27% 0.072 31.1)
#C43019 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) | #5F5313 | 0.199 |
| Deuteranopia (no green cones) | #83740D | 0.180 |
| Tritanopia (no blue cones) | #D8002D | 0.051 |
| Achromatopsia (no color) | #686868 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C43019
#C43019
oklch(54% 0.188 31.7)
- #007D8E
#007D8E
oklch(54.1% 0.094 211.3)
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 #C43019, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.029
- Dull Red #BB3F3F ΔE 0.036
- Scarlet #BE0119 ΔE 0.044
- Rusty Red #AF2F0D ΔE 0.044
- Brick Orange #C14A09 ΔE 0.045
- Firebrick #B22222 ΔE 0.047
- Cherry #CF0234 ΔE 0.049
- Lipstick Red #C0022F ΔE 0.051
Use #C43019 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.