#B0403D
Closest named color: Dull Red (#BB3F3F). oklch(52.7% 0.147 25), rgb(176, 64, 61).
Aa
White text reads best on this color (5.75:1).
About this color
#B0403D is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.147 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.022 away. White text reads best on it, at 5.75:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.147) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.64:1 |
| White text | 5.75:1 |
Values
| HEX | #B0403D |
| RGB | rgb(176, 64, 61) |
| HSL | hsl(2, 49%, 46%) |
| OKLCH | oklch(52.7% 0.147 25) |
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 #B0403D | 5.75:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #B0403D | 3.64:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #B0403D text on white | 5.75:1 | AA | Lc 78.0 | Fine for body text |
| #B0403D text on black | 3.64:1 | AA large text | Lc -23.8 | 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F1D0CD
oklch(88.5% 0.037 24)
-
Step 300
300
#E9B1AB
oklch(81% 0.066 25.6)
-
Step 400
400
#DB867F
oklch(70.8% 0.106 25.1)
-
Step 500
500
#CF655F
oklch(63.2% 0.135 25)
-
Step 600
600 (this color)
#B0403D
oklch(52.7% 0.147 25)
-
Step 700
700
#A03937
oklch(49.1% 0.137 24.7)
-
Step 800
800
#82302E
oklch(42.7% 0.114 24.6)
-
Step 900
900
#692C29
oklch(37.8% 0.088 25)
-
Step 950
950
#3E1A18
oklch(27% 0.057 24.8)
#B0403D 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) | #5D573C | 0.157 |
| Deuteranopia (no green cones) | #7A6F3A | 0.144 |
| Tritanopia (no blue cones) | #C12740 | 0.046 |
| Achromatopsia (no color) | #666666 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0403D
#B0403D
oklch(52.7% 0.147 25)
- #007984
#007984
oklch(52.6% 0.09 205.9)
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 #B0403D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Dusty Red #B9484E ΔE 0.031
- Light Maroon #A24857 ΔE 0.041
- Dark Rose #B5485D ΔE 0.043
- Rusty Red #AF2F0D ΔE 0.043
- Light Burgundy #A8415B ΔE 0.045
- Firebrick #B22222 ΔE 0.045
- Sinopia #BB3E03 ΔE 0.047
Use #B0403D 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.