#5B6CCE
Closest named color: Dark Periwinkle (#665FD1). oklch(56.7% 0.151 273.2), rgb(91, 108, 206).
Aa
White text reads best on this color (4.68:1).
About this color
#5B6CCE is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.151 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.034 away. White text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.48:1 |
| White text | 4.68:1 |
Values
| HEX | #5B6CCE |
| RGB | rgb(91, 108, 206) |
| HSL | hsl(231, 54%, 58%) |
| OKLCH | oklch(56.7% 0.151 273.2) |
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 #5B6CCE | 4.68:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #5B6CCE | 4.48:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #5B6CCE text on white | 4.68:1 | AA | Lc 72.3 | Content text, not long reading |
| #5B6CCE text on black | 4.48:1 | AA large text | Lc -29.4 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEED
oklch(80.8% 0.068 273.6)
-
Step 400
400
#8A9CE5
oklch(70.8% 0.109 272.8)
-
Step 500
500
#6F81DD
oklch(63.1% 0.14 273.4)
-
Step 600
600 (this color)
#5B6CCE
oklch(56.7% 0.151 273.2)
-
Step 700
700
#4857AF
oklch(49.1% 0.14 272.9)
-
Step 800
800
#3B478E
oklch(42.6% 0.117 273.2)
-
Step 900
900
#323C71
oklch(37.6% 0.091 273.2)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#5B6CCE 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) | #3D79D2 | 0.042 |
| Deuteranopia (no green cones) | #2E6FCC | 0.045 |
| Tritanopia (no blue cones) | #198293 | 0.134 |
| Achromatopsia (no color) | #747474 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6CCE
#5B6CCE
oklch(56.7% 0.151 273.2)
- #8E7400
#8E7400
oklch(56.7% 0.116 93.2)
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 #5B6CCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.034
- Royal Blue #4169E1 ΔE 0.043
- Slate Blue #6A5ACD ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.048
- Iris #6258C4 ΔE 0.050
- Windows Blue #3778BF ΔE 0.054
- French Blue #436BAD ΔE 0.060
- Warm Blue #4B57DB ΔE 0.063
Use #5B6CCE 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.