#B03338
Closest named color: Firebrick (#B22222). oklch(51.1% 0.161 22.9), rgb(176, 51, 56).
Aa
White text reads best on this color (6.21:1).
About this color
#B03338 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.161 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.026 away. White text reads best on it, at 6.21:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.37:1 |
| White text | 6.21:1 |
Values
| HEX | #B03338 |
| RGB | rgb(176, 51, 56) |
| HSL | hsl(358, 55%, 45%) |
| OKLCH | oklch(51.1% 0.161 22.9) |
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 #B03338 | 6.21:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #B03338 | 3.37:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #B03338 text on white | 6.21:1 | AA | Lc 79.9 | Fine for body text |
| #B03338 text on black | 3.37:1 | AA large text | Lc -21.9 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F5CFCC
oklch(88.6% 0.043 23.3)
-
Step 300
300
#EFADA9
oklch(80.8% 0.078 22.8)
-
Step 400
400
#E47F7C
oklch(70.7% 0.125 22.5)
-
Step 500
500
#D95B5B
oklch(63.2% 0.159 22.8)
-
Step 600
600
#C43B40
oklch(55.5% 0.173 22.9)
-
Step 700
700 (this color)
#B03338
oklch(51.1% 0.161 22.9)
-
Step 800
800
#89272A
oklch(42.7% 0.133 23.2)
-
Step 900
900
#6E2526
oklch(37.5% 0.104 22.8)
-
Step 950
950
#411717
oklch(27% 0.066 22.5)
#B03338 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) | #565037 | 0.175 |
| Deuteranopia (no green cones) | #756B34 | 0.162 |
| Tritanopia (no blue cones) | #C10936 | 0.044 |
| Achromatopsia (no color) | #616161 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B03338
#B03338
oklch(51.1% 0.161 22.9)
- #00757C
#00757C
oklch(51.2% 0.087 202.1)
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 #B03338, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.026
- Brown #A52A2A ΔE 0.032
- Dull Red #BB3F3F ΔE 0.033
- Rusty Red #AF2F0D ΔE 0.036
- Rufous #AE2012 ΔE 0.037
- Brick #A03623 ΔE 0.041
- Rust Red #AA2704 ΔE 0.043
- Lipstick Red #C0022F ΔE 0.044
Use #B03338 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.