#575DFB
Closest named color: Neon Blue (#4361EE). oklch(57.1% 0.23 274.7), rgb(87, 93, 251).
Aa
White text reads best on this color (4.81:1).
About this color
#575DFB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.230 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.031 away. White text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.230) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.36:1 |
| White text | 4.81:1 |
Values
| HEX | #575DFB |
| RGB | rgb(87, 93, 251) |
| HSL | hsl(238, 95%, 66%) |
| OKLCH | oklch(57.1% 0.23 274.7) |
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 #575DFB | 4.81:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #575DFB | 4.36:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #575DFB text on white | 4.81:1 | AA | Lc 72.8 | Content text, not long reading |
| #575DFB text on black | 4.36:1 | AA large text | Lc -28.9 | 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 600.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CED7FF
oklch(88.5% 0.056 275.2)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8596FF
oklch(70.6% 0.154 274.8)
-
Step 500
500
#6A78FF
oklch(63.2% 0.198 274.8)
-
Step 600
600 (this color)
#575DFB
oklch(57.1% 0.23 274.7)
-
Step 700
700
#4546D6
oklch(49% 0.214 274.8)
-
Step 800
800
#383BAD
oklch(42.7% 0.177 274.8)
-
Step 900
900
#2F3589
oklch(37.8% 0.138 274.6)
-
Step 950
950
#1B2050
oklch(27% 0.087 274.5)
#575DFB 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) | #0079FF | 0.074 |
| Deuteranopia (no green cones) | #006BF8 | 0.060 |
| Tritanopia (no blue cones) | #0086A4 | 0.188 |
| Achromatopsia (no color) | #727272 | 0.231 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #575DFB
#575DFB
oklch(57.1% 0.23 274.7)
- #8E7600
#8E7600
oklch(57.2% 0.117 94.7)
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 #575DFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.031
- Royal Blue #4169E1 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.054
- Bright Blue #0165FC ΔE 0.058
- Azul #1D5DEC ΔE 0.060
- Medium Slate Blue #7B68EE ΔE 0.064
- Cerulean Blue #056EEE ΔE 0.066
- Dark Periwinkle #665FD1 ΔE 0.068
Use #575DFB 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.