#AA310F
Closest named color: Rusty Red (#AF2F0D). oklch(49.4% 0.163 35.1), rgb(170, 49, 15).
Aa
White text reads best on this color (6.65:1).
About this color
#AA310F is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.163 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.010 away. White text reads best on it, at 6.65:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #AA310F |
| RGB | rgb(170, 49, 15) |
| HSL | hsl(13, 84%, 36%) |
| OKLCH | oklch(49.4% 0.163 35.1) |
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 #AA310F | 6.65:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #AA310F | 3.15:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #AA310F text on white | 6.65:1 | AA | Lc 81.7 | Fine for body text |
| #AA310F text on black | 3.15:1 | AA large text | Lc -20.2 | 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
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F4D0C6
oklch(88.5% 0.043 36)
-
Step 300
300
#EFAF9E
oklch(80.9% 0.079 35.4)
-
Step 400
400
#E38269
oklch(70.6% 0.126 35.4)
-
Step 500
500
#D95E40
oklch(63.1% 0.161 35)
-
Step 600
600
#C43F1C
oklch(55.5% 0.175 35.1)
-
Step 700
700 (this color)
#AA310F
oklch(49.4% 0.163 35.1)
-
Step 800
800
#892A10
oklch(42.7% 0.134 35.4)
-
Step 900
900
#6E2816
oklch(37.7% 0.104 35.4)
-
Step 950
950
#41180E
oklch(27% 0.067 34.9)
#AA310F 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) | #564B07 | 0.168 |
| Deuteranopia (no green cones) | #736604 | 0.153 |
| Tritanopia (no blue cones) | #BC002B | 0.059 |
| Achromatopsia (no color) | #5C5C5C | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA310F
#AA310F
oklch(49.4% 0.163 35.1)
- #006E81
#006E81
oklch(49.5% 0.088 215.1)
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 #AA310F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.010
- Rust Red #AA2704 ΔE 0.014
- Russet #A13905 ΔE 0.022
- Brick #A03623 ΔE 0.022
- Rufous #AE2012 ΔE 0.023
- Firebrick #B22222 ΔE 0.030
- Brown #A52A2A ΔE 0.030
- Burnt Red #9F2305 ΔE 0.035
Use #AA310F 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.