#5766EB
Closest named color: Neon Blue (#4361EE). oklch(57.3% 0.199 273.5), rgb(87, 102, 235).
Aa
White text reads best on this color (4.66:1).
About this color
#5766EB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.199 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.028 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #5766EB |
| RGB | rgb(87, 102, 235) |
| HSL | hsl(234, 79%, 63%) |
| OKLCH | oklch(57.3% 0.199 273.5) |
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 #5766EB | 4.66:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #5766EB | 4.50:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #5766EB text on white | 4.66:1 | AA | Lc 71.9 | Content text, not long reading |
| #5766EB text on black | 4.50:1 | AA | Lc -29.7 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#AEBDFB
oklch(80.9% 0.089 273.7)
-
Step 400
400
#8598F9
oklch(70.7% 0.143 273.8)
-
Step 500
500
#687BF6
oklch(63% 0.183 273.4)
-
Step 600
600 (this color)
#5766EB
oklch(57.3% 0.199 273.5)
-
Step 700
700
#444FC7
oklch(49.2% 0.185 273.5)
-
Step 800
800
#3741A1
oklch(42.6% 0.154 273.4)
-
Step 900
900
#2F3980
oklch(37.8% 0.119 273.3)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#5766EB 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) | #007BEF | 0.066 |
| Deuteranopia (no green cones) | #006EE8 | 0.057 |
| Tritanopia (no blue cones) | #00869F | 0.166 |
| Achromatopsia (no color) | #747474 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5766EB
#5766EB
oklch(57.3% 0.199 273.5)
- #907600
#907600
oklch(57.4% 0.118 93.5)
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 #5766EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.028
- Royal Blue #4169E1 ΔE 0.029
- Dark Periwinkle #665FD1 ΔE 0.045
- Warm Blue #4B57DB ΔE 0.047
- Medium Slate Blue #7B68EE ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.056
Use #5766EB 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.