#B90431
Closest named color: Lipstick Red (#C0022F). oklch(49.9% 0.198 19.4), rgb(185, 4, 49).
Aa
White text reads best on this color (6.72:1).
About this color
#B90431 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.198 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Lipstick Red (#C0022F), ΔE 0.015 away. White text reads best on it, at 6.72:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Lipstick Red (#C0022F) |
| Black text | 3.12:1 |
| White text | 6.72:1 |
Values
| HEX | #B90431 |
| RGB | rgb(185, 4, 49) |
| HSL | hsl(345, 96%, 37%) |
| OKLCH | oklch(49.9% 0.198 19.4) |
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 #B90431 | 6.72:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #B90431 | 3.12:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #B90431 text on white | 6.72:1 | AA | Lc 80.6 | Fine for body text |
| #B90431 text on black | 3.12:1 | AA large text | Lc -21.2 | 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
#FBCCCB
oklch(88.6% 0.053 19.6)
-
Step 300
300
#F9A8A8
oklch(81% 0.096 19.4)
-
Step 400
400
#F17479
oklch(70.7% 0.154 19.4)
-
Step 500
500
#E84757
oklch(63.1% 0.197 19.4)
-
Step 600
600
#D3173D
oklch(55.6% 0.213 19.2)
-
Step 700
700 (this color)
#B90431
oklch(49.9% 0.198 19.4)
-
Step 800
800
#940C28
oklch(42.7% 0.164 19.2)
-
Step 900
900
#771824
oklch(37.7% 0.128 19.5)
-
Step 950
950
#461116
oklch(27% 0.081 19.1)
#B90431 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) | #4A4531 | 0.222 |
| Deuteranopia (no green cones) | #73682B | 0.201 |
| Tritanopia (no blue cones) | #CC001D | 0.044 |
| Achromatopsia (no color) | #5C5C5C | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B90431
#B90431
oklch(49.9% 0.198 19.4)
- #007175
#007175
oklch(49.8% 0.085 199.1)
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 #B90431, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lipstick Red #C0022F ΔE 0.015
- Rose Red #BE013C ΔE 0.017
- Scarlet #BE0119 ΔE 0.025
- Rouge #AB1239 ΔE 0.030
- Firebrick #B22222 ΔE 0.031
- Raspberry #B00149 ΔE 0.040
- Rufous #AE2012 ΔE 0.042
- Ruby #CA0147 ΔE 0.044
Use #B90431 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.