#AE1F21
Closest named color: Firebrick (#B22222). oklch(48.7% 0.178 26.4), rgb(174, 31, 33).
Aa
White text reads best on this color (6.95:1).
About this color
#AE1F21 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.178 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.010 away. White text reads best on it, at 6.95:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.01:1 |
| White text | 6.95:1 |
Values
| HEX | #AE1F21 |
| RGB | rgb(174, 31, 33) |
| HSL | hsl(359, 70%, 40%) |
| OKLCH | oklch(48.7% 0.178 26.4) |
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 #AE1F21 | 6.95:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #AE1F21 | 3.01:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #AE1F21 text on white | 6.95:1 | AA | Lc 82.4 | Fine for body text |
| #AE1F21 text on black | 3.01:1 | AA large text | Lc -19.5 | 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
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC9
oklch(88.5% 0.047 26.2)
-
Step 300
300
#F3ABA3
oklch(80.8% 0.086 26.2)
-
Step 400
400
#EA7C72
oklch(70.8% 0.137 26.5)
-
Step 500
500
#E0544D
oklch(63.1% 0.176 26.3)
-
Step 600
600
#CB3130
oklch(55.6% 0.191 26.3)
-
Step 700
700 (this color)
#AE1F21
oklch(48.7% 0.178 26.4)
-
Step 800
800
#8E1F1E
oklch(42.6% 0.147 26.5)
-
Step 900
900
#72211E
oklch(37.6% 0.114 26.3)
-
Step 950
950
#431512
oklch(26.9% 0.072 26.7)
#AE1F21 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) | #4E461F | 0.193 |
| Deuteranopia (no green cones) | #71641A | 0.175 |
| Tritanopia (no blue cones) | #C00022 | 0.037 |
| Achromatopsia (no color) | #595959 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AE1F21
#AE1F21
oklch(48.7% 0.178 26.4)
- #006D77
#006D77
oklch(48.8% 0.084 205.9)
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 #AE1F21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.010
- Rufous #AE2012 ΔE 0.012
- Brown #A52A2A ΔE 0.020
- Rust Red #AA2704 ΔE 0.024
- Rusty Red #AF2F0D ΔE 0.029
- Scarlet #BE0119 ΔE 0.032
- Rouge #AB1239 ΔE 0.035
- Burnt Red #9F2305 ΔE 0.037
Use #AE1F21 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.