#B13A2A
Closest named color: Rusty Red (#AF2F0D). oklch(51.9% 0.158 30.7), rgb(177, 58, 42).
Aa
White text reads best on this color (5.98:1).
About this color
#B13A2A is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.158 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.024 away. White text reads best on it, at 5.98:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.50:1 |
| White text | 5.98:1 |
Values
| HEX | #B13A2A |
| RGB | rgb(177, 58, 42) |
| HSL | hsl(7, 62%, 43%) |
| OKLCH | oklch(51.9% 0.158 30.7) |
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 #B13A2A | 5.98:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #B13A2A | 3.50:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #B13A2A text on white | 5.98:1 | AA | Lc 78.9 | Fine for body text |
| #B13A2A text on black | 3.50:1 | AA large text | Lc -22.9 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4CFC9
oklch(88.4% 0.043 28.8)
-
Step 300
300
#EEAFA3
oklch(81% 0.076 31)
-
Step 400
400
#E28271
oklch(70.7% 0.122 31)
-
Step 500
500
#D75E4C
oklch(63% 0.156 30.5)
-
Step 600
600
#C3402F
oklch(55.7% 0.17 30.5)
-
Step 700
700 (this color)
#B13A2A
oklch(51.9% 0.158 30.7)
-
Step 800
800
#882A1E
oklch(42.7% 0.13 30.4)
-
Step 900
900
#6E281E
oklch(37.8% 0.102 30.6)
-
Step 950
950
#401812
oklch(26.9% 0.064 30.5)
#B13A2A 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) | #5C5327 | 0.165 |
| Deuteranopia (no green cones) | #796D26 | 0.152 |
| Tritanopia (no blue cones) | #C31737 | 0.055 |
| Achromatopsia (no color) | #636363 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B13A2A
#B13A2A
oklch(51.9% 0.158 30.7)
- #007686
#007686
oklch(51.9% 0.09 211.1)
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 #B13A2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.024
- Dull Red #BB3F3F ΔE 0.031
- Firebrick #B22222 ΔE 0.033
- Sinopia #BB3E03 ΔE 0.033
- Brick #A03623 ΔE 0.037
- Rust Red #AA2704 ΔE 0.039
- Rufous #AE2012 ΔE 0.039
- Brown #A52A2A ΔE 0.041
Use #B13A2A 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.