#575DB5
Closest named color: Iris (#6258C4). oklch(51.8% 0.137 277.5), rgb(87, 93, 181).
Aa
White text reads best on this color (5.77:1).
About this color
#575DB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.137 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.032 away. White text reads best on it, at 5.77:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #575DB5 |
| RGB | rgb(87, 93, 181) |
| HSL | hsl(236, 39%, 53%) |
| OKLCH | oklch(51.8% 0.137 277.5) |
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 #575DB5 | 5.77:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #575DB5 | 3.63:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #575DB5 text on white | 5.77:1 | AA | Lc 78.7 | Fine for body text |
| #575DB5 text on black | 3.63:1 | 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
#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
#909AE2
oklch(70.7% 0.106 277.3)
-
Step 500
500
#777FDA
oklch(63.1% 0.136 277.9)
-
Step 600
600
#6067C7
oklch(55.6% 0.147 277.4)
-
Step 700
700 (this color)
#575DB5
oklch(51.8% 0.137 277.5)
-
Step 800
800
#41468B
oklch(42.6% 0.113 277.4)
-
Step 900
900
#373B6F
oklch(37.6% 0.088 277.9)
-
Step 950
950
#202341
oklch(27% 0.056 277.7)
#575DB5 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) | #356AB8 | 0.047 |
| Deuteranopia (no green cones) | #2B62B3 | 0.049 |
| Tritanopia (no blue cones) | #2F7080 | 0.120 |
| Achromatopsia (no color) | #666666 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575DB5
#575DB5
oklch(51.8% 0.137 277.5)
- #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 #575DB5, closest first.
No curated palette has a color within ΔE 0.04 of #575DB5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.032
- French Blue #436BAD ΔE 0.046
- Slate Blue #6A5ACD ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.053
- Mid Blue #276AB3 ΔE 0.057
- Dusky Blue #475F94 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.064
Use #575DB5 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.