#B03A2C
Closest named color: Rusty Red (#AF2F0D). oklch(51.7% 0.156 30), rgb(176, 58, 44).
Aa
White text reads best on this color (6.02:1).
About this color
#B03A2C is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.156 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.025 away. White text reads best on it, at 6.02:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.156) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #B03A2C |
| RGB | rgb(176, 58, 44) |
| HSL | hsl(6, 60%, 43%) |
| OKLCH | oklch(51.7% 0.156 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 #B03A2C | 6.02:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #B03A2C | 3.48:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #B03A2C text on white | 6.02:1 | AA | Lc 79.1 | Fine for body text |
| #B03A2C text on black | 3.48:1 | AA large text | Lc -22.7 | 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
#E28273
oklch(70.7% 0.121 29.8)
-
Step 500
500
#D75F4E
oklch(63.2% 0.155 30.1)
-
Step 600
600
#C24131
oklch(55.6% 0.168 30.2)
-
Step 700
700 (this color)
#B03A2C
oklch(51.7% 0.156 30)
-
Step 800
800
#882A1F
oklch(42.7% 0.13 30)
-
Step 900
900
#6D281F
oklch(37.7% 0.1 29.9)
-
Step 950
950
#401813
oklch(26.9% 0.064 29.2)
#B03A2C 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) | #5B532A | 0.165 |
| Deuteranopia (no green cones) | #796C28 | 0.149 |
| Tritanopia (no blue cones) | #C21838 | 0.054 |
| Achromatopsia (no color) | #636363 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B03A2C
#B03A2C
oklch(51.7% 0.156 30)
- #007684
#007684
oklch(51.8% 0.089 209.2)
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 #B03A2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.025
- Dull Red #BB3F3F ΔE 0.032
- Firebrick #B22222 ΔE 0.033
- Brick #A03623 ΔE 0.036
- Sinopia #BB3E03 ΔE 0.036
- Rufous #AE2012 ΔE 0.038
- Rust Red #AA2704 ΔE 0.038
- Brown #A52A2A ΔE 0.039
Use #B03A2C 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.