#575BE9
Closest named color: Neon Blue (#4361EE). oklch(55.2% 0.21 275.9), rgb(87, 91, 233).
Aa
White text reads best on this color (5.14:1).
About this color
#575BE9 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.210 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.026 away. White text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.07:1 |
| White text | 5.14:1 |
Values
| HEX | #575BE9 |
| RGB | rgb(87, 91, 233) |
| HSL | hsl(238, 77%, 63%) |
| OKLCH | oklch(55.2% 0.21 275.9) |
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 #575BE9 | 5.14:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #575BE9 | 4.07:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #575BE9 text on white | 5.14:1 | AA | Lc 75.0 | Content text, not long reading |
| #575BE9 text on black | 4.07:1 | AA large text | Lc -26.8 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FC
oklch(88.5% 0.052 275.7)
-
Step 300
300
#AFBCFE
oklch(80.9% 0.095 275.5)
-
Step 400
400
#8896FD
oklch(70.7% 0.151 276)
-
Step 500
500
#6D78FB
oklch(63.1% 0.193 275.8)
-
Step 600
600 (this color)
#575BE9
oklch(55.2% 0.21 275.9)
-
Step 700
700
#494BCC
oklch(49.2% 0.195 275.9)
-
Step 800
800
#3B3EA5
oklch(42.7% 0.162 275.8)
-
Step 900
900
#323783
oklch(37.9% 0.126 275.8)
-
Step 950
950
#1D214C
oklch(27.1% 0.078 275.8)
#575BE9 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) | #0074EE | 0.073 |
| Deuteranopia (no green cones) | #0067E6 | 0.063 |
| Tritanopia (no blue cones) | #007E99 | 0.175 |
| Achromatopsia (no color) | #6D6D6D | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575BE9
#575BE9
oklch(55.2% 0.21 275.9)
- #867100
#867100
oklch(55.2% 0.114 96.1)
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 #575BE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.026
- Warm Blue #4B57DB ΔE 0.029
- Royal Blue #4169E1 ΔE 0.040
- Dark Periwinkle #665FD1 ΔE 0.044
- Slate Blue #6A5ACD ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.051
- Azul #1D5DEC ΔE 0.054
- Iris #6258C4 ΔE 0.059
Use #575BE9 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.