#5766CA
Closest named color: Dark Periwinkle (#665FD1). oklch(55% 0.154 273.8), rgb(87, 102, 202).
Aa
White text reads best on this color (5.04:1).
About this color
#5766CA is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.154 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.028 away. White text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.15:1 |
| White text | 5.04:1 |
Values
| HEX | #5766CA |
| RGB | rgb(87, 102, 202) |
| HSL | hsl(232, 52%, 57%) |
| OKLCH | oklch(55% 0.154 273.8) |
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 #5766CA | 5.04:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #5766CA | 4.15:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #5766CA text on white | 5.04:1 | AA | Lc 74.6 | Content text, not long reading |
| #5766CA text on black | 4.15:1 | AA large text | Lc -27.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEEE
oklch(80.9% 0.069 273.8)
-
Step 400
400
#8B9BE6
oklch(70.7% 0.111 274)
-
Step 500
500
#6F81DE
oklch(63.1% 0.141 273.5)
-
Step 600
600 (this color)
#5766CA
oklch(55% 0.154 273.8)
-
Step 700
700
#4956B1
oklch(49.1% 0.144 273.8)
-
Step 800
800
#3C478F
oklch(42.8% 0.119 273.8)
-
Step 900
900
#333C72
oklch(37.7% 0.092 274)
-
Step 950
950
#1E2443
oklch(27.2% 0.058 273.7)
#5766CA 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) | #3374CE | 0.046 |
| Deuteranopia (no green cones) | #206AC8 | 0.051 |
| Tritanopia (no blue cones) | #0D7D8E | 0.138 |
| Achromatopsia (no color) | #6F6F6F | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5766CA
#5766CA
oklch(55% 0.154 273.8)
- #876F00
#876F00
oklch(54.9% 0.112 93.9)
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 #5766CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.028
- Iris #6258C4 ΔE 0.036
- Slate Blue #6A5ACD ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.041
- Royal Blue #4169E1 ΔE 0.042
- Warm Blue #4B57DB ΔE 0.050
- French Blue #436BAD ΔE 0.055
- Windows Blue #3778BF ΔE 0.059
Use #5766CA 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.