#575CB8
Closest named color: Iris (#6258C4). oklch(51.8% 0.142 277.8), rgb(87, 92, 184).
Aa
White text reads best on this color (5.78:1).
About this color
#575CB8 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.142 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.027 away. White text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #575CB8 |
| RGB | rgb(87, 92, 184) |
| HSL | hsl(237, 41%, 53%) |
| OKLCH | oklch(51.8% 0.142 277.8) |
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 #575CB8 | 5.78:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #575CB8 | 3.62:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #575CB8 text on white | 5.78:1 | AA | Lc 78.7 | Fine for body text |
| #575CB8 text on black | 3.62:1 | AA large text | Lc -23.1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D3D7F3
oklch(88.5% 0.039 279.1)
-
Step 300
300
#B5BDED
oklch(80.9% 0.068 277.4)
-
Step 400
400
#9099E5
oklch(70.6% 0.111 278)
-
Step 500
500
#767FDD
oklch(63.2% 0.14 277.4)
-
Step 600
600
#6066CB
oklch(55.6% 0.154 277.6)
-
Step 700
700 (this color)
#575CB8
oklch(51.8% 0.142 277.8)
-
Step 800
800
#41458E
oklch(42.6% 0.119 277.7)
-
Step 900
900
#373B71
oklch(37.7% 0.091 277.9)
-
Step 950
950
#202342
oklch(27% 0.057 277.6)
#575CB8 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) | #2F69BB | 0.051 |
| Deuteranopia (no green cones) | #2462B6 | 0.054 |
| Tritanopia (no blue cones) | #2D7081 | 0.124 |
| Achromatopsia (no color) | #656565 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575CB8
#575CB8
oklch(51.8% 0.142 277.8)
- #796800
#796800
oklch(51.8% 0.107 97.9)
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 #575CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.027
- Slate Blue #6A5ACD ΔE 0.044
- Dark Periwinkle #665FD1 ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.049
- French Blue #436BAD ΔE 0.050
- Warm Blue #4B57DB ΔE 0.059
- Mid Blue #276AB3 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.064
Use #575CB8 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.