#C51519
Closest named color: Scarlet (#BE0119). oklch(52.4% 0.205 27.5), rgb(197, 21, 25).
Aa
White text reads best on this color (6.00:1).
About this color
#C51519 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.205 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.020 away. White text reads best on it, at 6.00:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.205) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #C51519 |
| RGB | rgb(197, 21, 25) |
| HSL | hsl(359, 81%, 43%) |
| OKLCH | oklch(52.4% 0.205 27.5) |
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 #C51519 | 6.00:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #C51519 | 3.49:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #C51519 text on white | 6.00:1 | AA | Lc 77.8 | Fine for body text |
| #C51519 text on black | 3.49:1 | AA large text | Lc -24.0 | 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F9CDC7
oklch(88.5% 0.051 27.2)
-
Step 300
300
#F7AAA0
oklch(81% 0.093 27.5)
-
Step 400
400
#EE796C
oklch(70.7% 0.147 27.9)
-
Step 500
500
#E54E45
oklch(63.1% 0.189 27.3)
-
Step 600
600 (this color)
#C51519
oklch(52.4% 0.205 27.5)
-
Step 700
700
#B41417
oklch(49.1% 0.19 27.5)
-
Step 800
800
#921716
oklch(42.7% 0.158 27.5)
-
Step 900
900
#751D19
oklch(37.6% 0.123 27.4)
-
Step 950
950
#451310
oklch(27% 0.078 27)
#C51519 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) | #554B15 | 0.224 |
| Deuteranopia (no green cones) | #7E700A | 0.202 |
| Tritanopia (no blue cones) | #DA001B | 0.042 |
| Achromatopsia (no color) | #636363 | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C51519
#C51519
oklch(52.4% 0.205 27.5)
- #007885
#007885
oklch(52.4% 0.09 208)
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 #C51519, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.020
- Lipstick Red #C0022F ΔE 0.028
- Cherry #CF0234 ΔE 0.033
- Firebrick #B22222 ΔE 0.037
- Rose Red #BE013C ΔE 0.044
- Rufous #AE2012 ΔE 0.047
- Rusty Red #AF2F0D ΔE 0.048
- Dull Red #BB3F3F ΔE 0.050
Use #C51519 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.