#575EBB
Closest named color: Iris (#6258C4). oklch(52.4% 0.144 277), rgb(87, 94, 187).
Aa
White text reads best on this color (5.63:1).
About this color
#575EBB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.144 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.026 away. White text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #575EBB |
| RGB | rgb(87, 94, 187) |
| HSL | hsl(236, 42%, 54%) |
| OKLCH | oklch(52.4% 0.144 277) |
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 #575EBB | 5.63:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #575EBB | 3.72:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #575EBB text on white | 5.63:1 | AA | Lc 78.0 | Fine for body text |
| #575EBB text on black | 3.72:1 | AA large text | Lc -23.8 | 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 600.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D3D8F1
oklch(88.6% 0.035 276.7)
-
Step 300
300
#B5BDEB
oklch(80.8% 0.066 277.1)
-
Step 400
400
#909AE1
oklch(70.6% 0.104 277.2)
-
Step 500
500
#7680D8
oklch(63.1% 0.132 277)
-
Step 600
600 (this color)
#575EBB
oklch(52.4% 0.144 277)
-
Step 700
700
#4F56AB
oklch(49.1% 0.134 276.7)
-
Step 800
800
#41478A
oklch(42.8% 0.11 276.9)
-
Step 900
900
#373C6F
oklch(37.8% 0.087 277.2)
-
Step 950
950
#202341
oklch(27% 0.056 277.7)
#575EBB 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) | #316BBE | 0.049 |
| Deuteranopia (no green cones) | #2463B9 | 0.053 |
| Tritanopia (no blue cones) | #297384 | 0.126 |
| Achromatopsia (no color) | #676767 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575EBB
#575EBB
oklch(52.4% 0.144 277)
- #7C6900
#7C6900
oklch(52.3% 0.108 96.6)
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 #575EBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.026
- Dark Periwinkle #665FD1 ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.041
- Light Indigo #6D5ACF ΔE 0.046
- French Blue #436BAD ΔE 0.049
- Warm Blue #4B57DB ΔE 0.056
- Mid Blue #276AB3 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.065
Use #575EBB 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.