#C53521
Closest named color: Sinopia (#BB3E03). oklch(54.7% 0.184 31.2), rgb(197, 53, 33).
Aa
White text reads best on this color (5.37:1).
About this color
#C53521 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.184 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.030 away. White text reads best on it, at 5.37:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.184) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #C53521 |
| RGB | rgb(197, 53, 33) |
| HSL | hsl(7, 71%, 45%) |
| OKLCH | oklch(54.7% 0.184 31.2) |
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 #C53521 | 5.37:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #C53521 | 3.90:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #C53521 text on white | 5.37:1 | AA | Lc 75.4 | Fine for body text |
| #C53521 text on black | 3.90:1 | AA large text | Lc -26.3 | 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
#F6CFC7
oklch(88.6% 0.046 31.6)
-
Step 300
300
#F1ADA0
oklch(80.8% 0.083 31.1)
-
Step 400
400
#E77F6C
oklch(70.7% 0.132 31.5)
-
Step 500
500
#DD5944
oklch(63.1% 0.17 31.3)
-
Step 600
600 (this color)
#C53521
oklch(54.7% 0.184 31.2)
-
Step 700
700
#AD2916
oklch(49.2% 0.171 31.4)
-
Step 800
800
#8C2416
oklch(42.7% 0.142 31)
-
Step 900
900
#712419
oklch(37.7% 0.111 30.9)
-
Step 950
950
#421710
oklch(27% 0.069 31.3)
#C53521 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) | #61561D | 0.194 |
| Deuteranopia (no green cones) | #847619 | 0.177 |
| Tritanopia (no blue cones) | #D90032 | 0.055 |
| Achromatopsia (no color) | #6A6A6A | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C53521
#C53521
oklch(54.7% 0.184 31.2)
- #007F90
#007F90
oklch(54.7% 0.095 211)
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 #C53521, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.030
- Dull Red #BB3F3F ΔE 0.032
- Brick Orange #C14A09 ΔE 0.041
- Rusty Red #AF2F0D ΔE 0.049
- Dusty Red #B9484E ΔE 0.050
- Burnt Orange #C04E01 ΔE 0.050
- Cherry #CF0234 ΔE 0.050
- Scarlet #BE0119 ΔE 0.050
Use #C53521 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.