#B03B2D
Closest named color: Rusty Red (#AF2F0D). oklch(51.9% 0.155 30), rgb(176, 59, 45).
Aa
White text reads best on this color (5.98:1).
About this color
#B03B2D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.155 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.026 away. White text reads best on it, at 5.98:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.155) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.50:1 |
| White text | 5.98:1 |
Values
| HEX | #B03B2D |
| RGB | rgb(176, 59, 45) |
| HSL | hsl(6, 59%, 43%) |
| OKLCH | oklch(51.9% 0.155 30) |
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 #B03B2D | 5.98:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #B03B2D | 3.50:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #B03B2D text on white | 5.98:1 | AA | Lc 78.9 | Fine for body text |
| #B03B2D text on black | 3.50:1 | AA large text | Lc -22.9 | 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
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C9
oklch(88.6% 0.042 30.9)
-
Step 300
300
#EDAFA4
oklch(80.9% 0.075 30.1)
-
Step 400
400
#E18273
oklch(70.6% 0.12 29.9)
-
Step 500
500
#D65F4F
oklch(63.1% 0.153 29.8)
-
Step 600
600
#C14132
oklch(55.5% 0.166 29.9)
-
Step 700
700 (this color)
#B03B2D
oklch(51.9% 0.155 30)
-
Step 800
800
#872B20
oklch(42.7% 0.128 30)
-
Step 900
900
#6D281F
oklch(37.7% 0.1 29.9)
-
Step 950
950
#401913
oklch(27.1% 0.062 30.5)
#B03B2D 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) | #5C532B | 0.162 |
| Deuteranopia (no green cones) | #796D29 | 0.150 |
| Tritanopia (no blue cones) | #C21A39 | 0.054 |
| Achromatopsia (no color) | #636363 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B03B2D
#B03B2D
oklch(51.9% 0.155 30)
- #007685
#007685
oklch(51.8% 0.09 210.1)
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 #B03B2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.026
- Dull Red #BB3F3F ΔE 0.031
- Firebrick #B22222 ΔE 0.034
- Sinopia #BB3E03 ΔE 0.036
- Brick #A03623 ΔE 0.037
- Rust Red #AA2704 ΔE 0.040
- Rufous #AE2012 ΔE 0.040
- Brown #A52A2A ΔE 0.040
Use #B03B2D 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.