#AD1F25
Closest named color: Firebrick (#B22222). oklch(48.6% 0.177 25.2), rgb(173, 31, 37).
Aa
White text reads best on this color (7.00:1).
About this color
#AD1F25 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.177 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.013 away. White text reads best on it, at 7.00:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #AD1F25 |
| RGB | rgb(173, 31, 37) |
| HSL | hsl(357, 70%, 40%) |
| OKLCH | oklch(48.6% 0.177 25.2) |
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 #AD1F25 | 7.00:1 | AAA | Lc -87.6 | Fine for body text |
| Black text on #AD1F25 | 2.99:1 | Fails | Lc 21.5 | Dividers and decoration only |
| #AD1F25 text on white | 7.00:1 | AAA | Lc 82.6 | Fine for body text |
| #AD1F25 text on black | 2.99:1 | Fails | Lc -19.3 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F7CEC9
oklch(88.5% 0.047 26.2)
-
Step 300
300
#F3ABA5
oklch(80.8% 0.086 24.5)
-
Step 400
400
#E97C74
oklch(70.7% 0.136 25.4)
-
Step 500
500
#DF5450
oklch(63% 0.175 25.1)
-
Step 600
600
#CB3134
oklch(55.6% 0.19 25.1)
-
Step 700
700 (this color)
#AD1F25
oklch(48.6% 0.177 25.2)
-
Step 800
800
#8E1F21
oklch(42.7% 0.147 25.2)
-
Step 900
900
#722120
oklch(37.6% 0.114 25.1)
-
Step 950
950
#431513
oklch(26.9% 0.072 25.6)
#AD1F25 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) | #4D4623 | 0.193 |
| Deuteranopia (no green cones) | #70641F | 0.175 |
| Tritanopia (no blue cones) | #BF0023 | 0.036 |
| Achromatopsia (no color) | #595959 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD1F25
#AD1F25
oklch(48.6% 0.177 25.2)
- #006C76
#006C76
oklch(48.5% 0.083 206)
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 #AD1F25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.013
- Rufous #AE2012 ΔE 0.016
- Brown #A52A2A ΔE 0.018
- Rust Red #AA2704 ΔE 0.027
- Rouge #AB1239 ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.033
- Scarlet #BE0119 ΔE 0.034
- Auburn #9B2226 ΔE 0.037
Use #AD1F25 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.