#5E6ECB
Closest named color: Dark Periwinkle (#665FD1). oklch(57.1% 0.143 273.7), rgb(94, 110, 203).
Aa
White text reads best on this color (4.59:1).
About this color
#5E6ECB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.143 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.040 away. White text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.56:1 |
| White text | 4.59:1 |
Values
| HEX | #5E6ECB |
| RGB | rgb(94, 110, 203) |
| HSL | hsl(231, 51%, 58%) |
| OKLCH | oklch(57.1% 0.143 273.7) |
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 #5E6ECB | 4.59:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #5E6ECB | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #5E6ECB text on white | 4.59:1 | AA | Lc 71.7 | Content text, not long reading |
| #5E6ECB text on black | 4.56:1 | AA | Lc -29.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B3BEEB
oklch(80.8% 0.065 274.1)
-
Step 400
400
#8C9CE1
oklch(70.7% 0.103 273.5)
-
Step 500
500
#7182D9
oklch(63.2% 0.132 273.7)
-
Step 600
600 (this color)
#5E6ECB
oklch(57.1% 0.143 273.7)
-
Step 700
700
#4A57AB
oklch(49% 0.134 273.8)
-
Step 800
800
#3D488B
oklch(42.8% 0.111 273.8)
-
Step 900
900
#343D6F
oklch(37.8% 0.086 273.9)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#5E6ECB 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) | #457ACE | 0.038 |
| Deuteranopia (no green cones) | #3871C9 | 0.041 |
| Tritanopia (no blue cones) | #298293 | 0.126 |
| Achromatopsia (no color) | #757575 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5E6ECB
#5E6ECB
oklch(57.1% 0.143 273.7)
- #8F7500
#8F7500
oklch(57.1% 0.117 93.3)
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 #5E6ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.040
- Royal Blue #4169E1 ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.051
- Windows Blue #3778BF ΔE 0.052
- Light Indigo #6D5ACF ΔE 0.052
- Iris #6258C4 ΔE 0.054
- French Blue #436BAD ΔE 0.059
- Medium Slate Blue #7B68EE ΔE 0.070
Use #5E6ECB 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.