#B12539
Closest named color: Firebrick (#B22222). oklch(50% 0.175 19.1), rgb(177, 37, 57).
Aa
White text reads best on this color (6.57:1).
About this color
#B12539 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.175 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.025 away. White text reads best on it, at 6.57:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.19:1 |
| White text | 6.57:1 |
Values
| HEX | #B12539 |
| RGB | rgb(177, 37, 57) |
| HSL | hsl(351, 65%, 42%) |
| OKLCH | oklch(50% 0.175 19.1) |
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 #B12539 | 6.57:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #B12539 | 3.19:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #B12539 text on white | 6.57:1 | AA | Lc 81.1 | Fine for body text |
| #B12539 text on black | 3.19:1 | AA large text | Lc -20.8 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CDCD
oklch(88.4% 0.048 18.1)
-
Step 300
300
#F2ABAB
oklch(80.9% 0.084 19.1)
-
Step 400
400
#E97B7F
oklch(70.8% 0.136 18.8)
-
Step 500
500
#DE545E
oklch(63.1% 0.172 19.3)
-
Step 600
600
#CA3145
oklch(55.7% 0.188 19.1)
-
Step 700
700 (this color)
#B12539
oklch(50% 0.175 19.1)
-
Step 800
800
#8D1F2D
oklch(42.7% 0.145 19.3)
-
Step 900
900
#712129
oklch(37.6% 0.112 18.7)
-
Step 950
950
#431518
oklch(27.1% 0.071 19.4)
#B12539 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) | #4F4A39 | 0.192 |
| Deuteranopia (no green cones) | #726835 | 0.177 |
| Tritanopia (no blue cones) | #C3002E | 0.037 |
| Achromatopsia (no color) | #5D5D5D | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B12539
#B12539
oklch(50% 0.175 19.1)
- #007276
#007276
oklch(50.1% 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 #B12539, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.025
- Rouge #AB1239 ΔE 0.026
- Brown #A52A2A ΔE 0.031
- Rose Red #BE013C ΔE 0.032
- Lipstick Red #C0022F ΔE 0.032
- Rufous #AE2012 ΔE 0.037
- Scarlet #BE0119 ΔE 0.038
- Raspberry #B00149 ΔE 0.042
Use #B12539 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.