#D52103
Closest named color: Crimson (#DC143C). oklch(55.9% 0.214 31.3), rgb(213, 33, 3).
Aa
White text reads best on this color (5.18:1).
About this color
#D52103 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.214 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.045 away. White text reads best on it, at 5.18:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.214) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #D52103 |
| RGB | rgb(213, 33, 3) |
| HSL | hsl(9, 97%, 42%) |
| OKLCH | oklch(55.9% 0.214 31.3) |
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 #D52103 | 5.18:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #D52103 | 4.04:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #D52103 text on white | 5.18:1 | AA | Lc 73.6 | Content text, not long reading |
| #D52103 text on black | 4.04:1 | AA large text | Lc -28.1 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE4DF
oklch(93.7% 0.027 31.7)
-
Step 200
200
#FBCDC4
oklch(88.6% 0.054 31)
-
Step 300
300
#F9A99A
oklch(80.9% 0.098 31)
-
Step 400
400
#F17762
oklch(70.7% 0.154 31.3)
-
Step 500
500
#E84B34
oklch(63% 0.197 31.3)
-
Step 600
600 (this color)
#D52103
oklch(55.9% 0.214 31.3)
-
Step 700
700
#B31800
oklch(49% 0.189 31.3)
-
Step 800
800
#941200
oklch(42.6% 0.165 31.3)
-
Step 900
900
#771B0E
oklch(37.7% 0.128 31.3)
-
Step 950
950
#46120A
oklch(26.9% 0.081 31.5)
#D52103 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) | #605400 | 0.231 |
| Deuteranopia (no green cones) | #8B7B00 | 0.206 |
| Tritanopia (no blue cones) | #EB001F | 0.046 |
| Achromatopsia (no color) | #6D6D6D | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D52103
#D52103
oklch(55.9% 0.214 31.3)
- #008395
#008395
oklch(56% 0.097 211.5)
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 #D52103, closest first.
No curated palette has a color within ΔE 0.04 of #D52103.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.045
- Cherry #CF0234 ΔE 0.045
- Tomato Red #EC2D01 ΔE 0.051
- Sinopia #BB3E03 ΔE 0.056
- Scarlet #BE0119 ΔE 0.059
- Brick Orange #C14A09 ΔE 0.060
- Dull Red #BB3F3F ΔE 0.061
- Imperial Red #E63946 ΔE 0.063
Use #D52103 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.