#E43527
Closest named color: Tomato Red (#EC2D01). oklch(60.2% 0.213 29.4), rgb(228, 53, 39).
Aa
Black text reads best on this color (4.83:1).
About this color
#E43527 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.213 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Tomato Red (#EC2D01), ΔE 0.020 away. Black text reads best on it, at 4.83:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Tomato Red (#EC2D01) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #E43527 |
| RGB | rgb(228, 53, 39) |
| HSL | hsl(4, 78%, 52%) |
| OKLCH | oklch(60.2% 0.213 29.4) |
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 #E43527 | 4.34:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #E43527 | 4.83:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #E43527 text on white | 4.34:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #E43527 text on black | 4.83:1 | AA | Lc -33.2 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FDCCC3
oklch(88.5% 0.057 30.3)
-
Step 300
300
#FDA799
oklch(80.9% 0.105 29.7)
-
Step 400
400
#F77260
oklch(70.8% 0.167 29.7)
-
Step 500
500 (this color)
#E43527
oklch(60.2% 0.213 29.4)
-
Step 600
600
#D80500
oklch(55.5% 0.226 29.5)
-
Step 700
700
#B70300
oklch(49% 0.2 29.4)
-
Step 800
800
#980200
oklch(42.8% 0.174 29.4)
-
Step 900
900
#7B130C
oklch(37.8% 0.139 29.3)
-
Step 950
950
#480F09
oklch(26.9% 0.087 29.9)
#E43527 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) | #6D6123 | 0.227 |
| Deuteranopia (no green cones) | #97871D | 0.207 |
| Tritanopia (no blue cones) | #FB0034 | 0.051 |
| Achromatopsia (no color) | #797979 | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E43527
#E43527
oklch(60.2% 0.213 29.4)
- #0091A2
#0091A2
oklch(60.1% 0.104 209.3)
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 #E43527, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tomato Red #EC2D01 ΔE 0.020
- Imperial Red #E63946 ΔE 0.029
- Vermillion #F4320C ΔE 0.033
- Red Pantone #EF233C ΔE 0.034
- Cherry Red #F7022A ΔE 0.043
- Deep Orange #DC4D01 ΔE 0.044
- Faded Red #D3494E ΔE 0.046
- Crimson #DC143C ΔE 0.048
Use #E43527 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.