#575BB9
Closest named color: Iris (#6258C4). oklch(51.7% 0.145 278.2), rgb(87, 91, 185).
Aa
White text reads best on this color (5.82:1).
About this color
#575BB9 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.145 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.025 away. White text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.60:1 |
| White text | 5.82:1 |
Values
| HEX | #575BB9 |
| RGB | rgb(87, 91, 185) |
| HSL | hsl(238, 41%, 53%) |
| OKLCH | oklch(51.7% 0.145 278.2) |
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 #575BB9 | 5.82:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #575BB9 | 3.60:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #575BB9 text on white | 5.82:1 | AA | Lc 78.9 | Fine for body text |
| #575BB9 text on black | 3.60:1 | AA large text | Lc -22.9 | 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
#B6BDEE
oklch(81% 0.07 278.4)
-
Step 400
400
#9099E6
oklch(70.7% 0.113 278)
-
Step 500
500
#777EDE
oklch(63.1% 0.143 278.3)
-
Step 600
600
#6165CC
oklch(55.6% 0.156 278.3)
-
Step 700
700 (this color)
#575BB9
oklch(51.7% 0.145 278.2)
-
Step 800
800
#42458F
oklch(42.8% 0.12 278.3)
-
Step 900
900
#373B72
oklch(37.8% 0.093 277.8)
-
Step 950
950
#202343
oklch(27.1% 0.059 277.6)
#575BB9 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) | #2C69BC | 0.054 |
| Deuteranopia (no green cones) | #2061B7 | 0.057 |
| Tritanopia (no blue cones) | #2C7081 | 0.127 |
| Achromatopsia (no color) | #656565 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575BB9
#575BB9
oklch(51.7% 0.145 278.2)
- #786800
#786800
oklch(51.7% 0.107 98.6)
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 #575BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.025
- Slate Blue #6A5ACD ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.048
- French Blue #436BAD ΔE 0.053
- Warm Blue #4B57DB ΔE 0.057
- Mid Blue #276AB3 ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.064
Use #575BB9 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.