#B03140
Closest named color: Firebrick (#B22222). oklch(51.1% 0.163 18.7), rgb(176, 49, 64).
Aa
White text reads best on this color (6.25:1).
About this color
#B03140 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.163 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.033 away. White text reads best on it, at 6.25:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #B03140 |
| RGB | rgb(176, 49, 64) |
| HSL | hsl(353, 56%, 44%) |
| OKLCH | oklch(51.1% 0.163 18.7) |
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 #B03140 | 6.25:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #B03140 | 3.35:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #B03140 text on white | 6.25:1 | AA | Lc 80.0 | Fine for body text |
| #B03140 text on black | 3.35:1 | AA large text | Lc -21.8 | 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 700.
-
Step 50
50
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECE
oklch(88.5% 0.044 18)
-
Step 300
300
#EFADAD
oklch(81% 0.078 18.9)
-
Step 400
400
#E47E82
oklch(70.6% 0.126 18.3)
-
Step 500
500
#D95962
oklch(63% 0.161 18.8)
-
Step 600
600
#C43949
oklch(55.5% 0.175 18.7)
-
Step 700
700 (this color)
#B03140
oklch(51.1% 0.163 18.7)
-
Step 800
800
#892531
oklch(42.6% 0.134 18.4)
-
Step 900
900
#6F252B
oklch(37.8% 0.105 18.9)
-
Step 950
950
#411719
oklch(27% 0.066 19.7)
#B03140 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) | #544F40 | 0.178 |
| Deuteranopia (no green cones) | #746A3C | 0.163 |
| Tritanopia (no blue cones) | #C10737 | 0.042 |
| Achromatopsia (no color) | #606060 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B03140
#B03140
oklch(51.1% 0.163 18.7)
- #007579
#007579
oklch(51.1% 0.087 199)
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 #B03140, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.033
- Brown #A52A2A ΔE 0.036
- Dull Red #BB3F3F ΔE 0.037
- Rouge #AB1239 ΔE 0.039
- Light Burgundy #A8415B ΔE 0.040
- Rose Red #BE013C ΔE 0.042
- Lipstick Red #C0022F ΔE 0.043
- Rufous #AE2012 ΔE 0.045
Use #B03140 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.