#575BB5
Closest named color: Iris (#6258C4). oklch(51.4% 0.14 278.4), rgb(87, 91, 181).
Aa
White text reads best on this color (5.88:1).
About this color
#575BB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.140 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.030 away. White text reads best on it, at 5.88:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #575BB5 |
| RGB | rgb(87, 91, 181) |
| HSL | hsl(237, 39%, 53%) |
| OKLCH | oklch(51.4% 0.14 278.4) |
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 #575BB5 | 5.88:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #575BB5 | 3.56:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #575BB5 text on white | 5.88:1 | AA | Lc 79.2 | Fine for body text |
| #575BB5 text on black | 3.56:1 | AA large text | Lc -22.6 | 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
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D3D7F2
oklch(88.4% 0.037 278.9)
-
Step 300
300
#B6BDEC
oklch(80.9% 0.067 278.2)
-
Step 400
400
#9199E3
oklch(70.6% 0.108 278.5)
-
Step 500
500
#787FDB
oklch(63.2% 0.137 278.4)
-
Step 600
600
#6266C9
oklch(55.6% 0.15 278.6)
-
Step 700
700 (this color)
#575BB5
oklch(51.4% 0.14 278.4)
-
Step 800
800
#42458C
oklch(42.6% 0.115 278.5)
-
Step 900
900
#383B70
oklch(37.7% 0.089 278.7)
-
Step 950
950
#202342
oklch(27% 0.057 277.6)
#575BB5 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) | #3068B8 | 0.051 |
| Deuteranopia (no green cones) | #2661B3 | 0.053 |
| Tritanopia (no blue cones) | #306F7F | 0.123 |
| Achromatopsia (no color) | #646464 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575BB5
#575BB5
oklch(51.4% 0.14 278.4)
- #776700
#776700
oklch(51.3% 0.106 98.5)
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 #575BB5, closest first.
No curated palette has a color within ΔE 0.04 of #575BB5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.030
- Slate Blue #6A5ACD ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.050
- French Blue #436BAD ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.053
- Mid Blue #276AB3 ΔE 0.060
- Dusky Blue #475F94 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.063
Use #575BB5 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.