#B13401
Closest named color: Rusty Red (#AF2F0D). oklch(50.9% 0.169 37.3), rgb(177, 52, 1).
Aa
White text reads best on this color (6.24:1).
About this color
#B13401 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.169 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.012 away. White text reads best on it, at 6.24:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #B13401 |
| RGB | rgb(177, 52, 1) |
| HSL | hsl(17, 99%, 35%) |
| OKLCH | oklch(50.9% 0.169 37.3) |
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 #B13401 | 6.24:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #B13401 | 3.36:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #B13401 text on white | 6.24:1 | AA | Lc 79.9 | Fine for body text |
| #B13401 text on black | 3.36:1 | AA large text | Lc -22.0 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F5CFC4
oklch(88.4% 0.046 36.7)
-
Step 300
300
#F0AF9B
oklch(81% 0.082 37.8)
-
Step 400
400
#E58164
oklch(70.6% 0.131 37)
-
Step 500
500
#DB5D36
oklch(63.2% 0.167 37.5)
-
Step 600
600
#C63D07
oklch(55.6% 0.182 37.2)
-
Step 700
700 (this color)
#B13401
oklch(50.9% 0.169 37.3)
-
Step 800
800
#8B2803
oklch(42.8% 0.14 37.2)
-
Step 900
900
#6F2710
oklch(37.7% 0.108 37.5)
-
Step 950
950
#42180B
oklch(27.1% 0.069 37.6)
#B13401 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) | #5A4F00 | 0.172 |
| Deuteranopia (no green cones) | #796B00 | 0.155 |
| Tritanopia (no blue cones) | #C4002D | 0.066 |
| Achromatopsia (no color) | #606060 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B13401
#B13401
oklch(50.9% 0.169 37.3)
- #007288
#007288
oklch(50.9% 0.091 217.4)
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 #B13401, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.012
- Rust Red #AA2704 ΔE 0.027
- Sinopia #BB3E03 ΔE 0.029
- Russet #A13905 ΔE 0.032
- Rufous #AE2012 ΔE 0.033
- Firebrick #B22222 ΔE 0.036
- Brick #A03623 ΔE 0.037
- Burnt Umber #A0450E ΔE 0.040
Use #B13401 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.