#5B57EA
Closest named color: Warm Blue (#4B57DB). oklch(54.9% 0.215 277.8), rgb(91, 87, 234).
Aa
White text reads best on this color (5.25:1).
About this color
#5B57EA is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.215 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.032 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.215) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #5B57EA |
| RGB | rgb(91, 87, 234) |
| HSL | hsl(242, 78%, 63%) |
| OKLCH | oklch(54.9% 0.215 277.8) |
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 #5B57EA | 5.25:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #5B57EA | 3.99:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #5B57EA text on white | 5.25:1 | AA | Lc 75.5 | Fine for body text |
| #5B57EA text on black | 3.99:1 | AA large text | Lc -26.2 | 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
#E5E9FD
oklch(93.7% 0.027 276.8)
-
Step 200
200
#D0D6FD
oklch(88.4% 0.054 278.3)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8B94FF
oklch(70.6% 0.155 278)
-
Step 500
500
#7175FD
oklch(63% 0.198 277.8)
-
Step 600
600 (this color)
#5B57EA
oklch(54.9% 0.215 277.8)
-
Step 700
700
#4D48CE
oklch(49.2% 0.2 277.7)
-
Step 800
800
#3F3CA6
oklch(42.7% 0.165 278)
-
Step 900
900
#343584
oklch(37.7% 0.13 277.6)
-
Step 950
950
#1E204D
oklch(27% 0.081 277.5)
#5B57EA 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) | #0072EF | 0.079 |
| Deuteranopia (no green cones) | #0066E7 | 0.070 |
| Tritanopia (no blue cones) | #007C99 | 0.179 |
| Achromatopsia (no color) | #6C6C6C | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B57EA
#5B57EA
oklch(54.9% 0.215 277.8)
- #837100
#837100
oklch(54.9% 0.113 98.1)
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 #5B57EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.032
- Neon Blue #4361EE ΔE 0.034
- Dark Periwinkle #665FD1 ΔE 0.047
- Royal Blue #4169E1 ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.051
- Iris #6258C4 ΔE 0.060
- Azul #1D5DEC ΔE 0.060
Use #5B57EA 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.