#B03D24
Closest named color: Rusty Red (#AF2F0D). oklch(52% 0.155 33.8), rgb(176, 61, 36).
Aa
White text reads best on this color (5.93:1).
About this color
#B03D24 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.155 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.024 away. White text reads best on it, at 5.93:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.155) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #B03D24 |
| RGB | rgb(176, 61, 36) |
| HSL | hsl(11, 66%, 42%) |
| OKLCH | oklch(52% 0.155 33.8) |
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 #B03D24 | 5.93:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #B03D24 | 3.53:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #B03D24 text on white | 5.93:1 | AA | Lc 78.7 | Fine for body text |
| #B03D24 text on black | 3.53:1 | AA large text | Lc -23.1 | 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 700.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D0C7
oklch(88.5% 0.041 34.8)
-
Step 300
300
#EDB0A1
oklch(81% 0.075 34.2)
-
Step 400
400
#E1836E
oklch(70.6% 0.121 33.5)
-
Step 500
500
#D66147
oklch(63.2% 0.153 34)
-
Step 600
600
#C14328
oklch(55.6% 0.167 33.7)
-
Step 700
700 (this color)
#B03D24
oklch(52% 0.155 33.8)
-
Step 800
800
#872C18
oklch(42.7% 0.129 33.9)
-
Step 900
900
#6D291A
oklch(37.7% 0.101 34)
-
Step 950
950
#401910
oklch(27% 0.063 34.3)
#B03D24 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) | #5E5420 | 0.159 |
| Deuteranopia (no green cones) | #7A6D1F | 0.145 |
| Tritanopia (no blue cones) | #C21D38 | 0.059 |
| Achromatopsia (no color) | #646464 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B03D24
#B03D24
oklch(52% 0.155 33.8)
- #007689
#007689
oklch(52% 0.091 214)
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 #B03D24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.024
- Sinopia #BB3E03 ΔE 0.028
- Dull Red #BB3F3F ΔE 0.036
- Brick #A03623 ΔE 0.038
- Russet #A13905 ΔE 0.038
- Burnt Umber #A0450E ΔE 0.039
- Firebrick #B22222 ΔE 0.040
- Rust Red #AA2704 ΔE 0.040
Use #B03D24 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.