#B50B28
Closest named color: Firebrick (#B22222). oklch(49.2% 0.193 22.4), rgb(181, 11, 40).
Aa
White text reads best on this color (6.90:1).
About this color
#B50B28 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.193 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.021 away. White text reads best on it, at 6.90:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.193) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.04:1 |
| White text | 6.90:1 |
Values
| HEX | #B50B28 |
| RGB | rgb(181, 11, 40) |
| HSL | hsl(350, 89%, 38%) |
| OKLCH | oklch(49.2% 0.193 22.4) |
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 #B50B28 | 6.90:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #B50B28 | 3.04:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #B50B28 text on white | 6.90:1 | AA | Lc 81.6 | Fine for body text |
| #B50B28 text on black | 3.04:1 | AA large text | Lc -20.3 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E2
oklch(93.6% 0.028 20.4)
-
Step 200
200
#FACCCA
oklch(88.4% 0.052 21.1)
-
Step 300
300
#F7A9A5
oklch(80.9% 0.093 22.6)
-
Step 400
400
#EF7675
oklch(70.6% 0.15 22.1)
-
Step 500
500
#E64B51
oklch(63.1% 0.191 22.4)
-
Step 600
600
#D12035
oklch(55.5% 0.207 22.4)
-
Step 700
700 (this color)
#B50B28
oklch(49.2% 0.193 22.4)
-
Step 800
800
#931322
oklch(42.8% 0.16 22.5)
-
Step 900
900
#761B21
oklch(37.7% 0.125 22.2)
-
Step 950
950
#461214
oklch(27.1% 0.08 22)
#B50B28 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) | #4B4427 | 0.214 |
| Deuteranopia (no green cones) | #726621 | 0.194 |
| Tritanopia (no blue cones) | #C8001B | 0.040 |
| Achromatopsia (no color) | #5A5A5A | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B50B28
#B50B28
oklch(49.2% 0.193 22.4)
- #006E75
#006E75
oklch(49% 0.083 202.5)
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 #B50B28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.021
- Scarlet #BE0119 ΔE 0.022
- Lipstick Red #C0022F ΔE 0.024
- Rouge #AB1239 ΔE 0.029
- Rufous #AE2012 ΔE 0.030
- Rose Red #BE013C ΔE 0.030
- Brown #A52A2A ΔE 0.037
- Rust Red #AA2704 ΔE 0.043
Use #B50B28 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.