#5B5EE4
Closest named color: Warm Blue (#4B57DB). oklch(55.6% 0.199 276.8), rgb(91, 94, 228).
Aa
White text reads best on this color (5.04:1).
About this color
#5B5EE4 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.199 and its hue 277°. 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 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 4.16:1 |
| White text | 5.04:1 |
Values
| HEX | #5B5EE4 |
| RGB | rgb(91, 94, 228) |
| HSL | hsl(239, 72%, 63%) |
| OKLCH | oklch(55.6% 0.199 276.8) |
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 #5B5EE4 | 5.04:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #5B5EE4 | 4.16:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #5B5EE4 text on white | 5.04:1 | AA | Lc 74.4 | Content text, not long reading |
| #5B5EE4 text on black | 4.16:1 | AA large text | Lc -27.3 | 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
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FB
oklch(88.5% 0.05 276.6)
-
Step 300
300
#B1BCFB
oklch(80.9% 0.09 276.5)
-
Step 400
400
#8A96F8
oklch(70.6% 0.143 276.8)
-
Step 500
500
#7079F5
oklch(63.1% 0.183 276.7)
-
Step 600
600 (this color)
#5B5EE4
oklch(55.6% 0.199 276.8)
-
Step 700
700
#4B4CC6
oklch(49% 0.185 276.8)
-
Step 800
800
#3D3FA0
oklch(42.6% 0.154 276.8)
-
Step 900
900
#34377F
oklch(37.7% 0.119 277.2)
-
Step 950
950
#1E214A
oklch(27% 0.075 277)
#5B5EE4 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) | #0075E8 | 0.074 |
| Deuteranopia (no green cones) | #0069E1 | 0.067 |
| Tritanopia (no blue cones) | #007F98 | 0.170 |
| Achromatopsia (no color) | #6F6F6F | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5EE4
#5B5EE4
oklch(55.6% 0.199 276.8)
- #877300
#877300
oklch(55.8% 0.115 97)
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 #5B5EE4, 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 0.032
- Dark Periwinkle #665FD1 ΔE 0.033
- Royal Blue #4169E1 ΔE 0.037
- Slate Blue #6A5ACD ΔE 0.041
- Light Indigo #6D5ACF ΔE 0.041
- Iris #6258C4 ΔE 0.051
- Medium Slate Blue #7B68EE ΔE 0.057
Use #5B5EE4 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.