#5B5DB4
Closest named color: Iris (#6258C4). oklch(52% 0.135 279.6), rgb(91, 93, 180).
Aa
White text reads best on this color (5.72:1).
About this color
#5B5DB4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.135 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.031 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #5B5DB4 |
| RGB | rgb(91, 93, 180) |
| HSL | hsl(239, 37%, 53%) |
| OKLCH | oklch(52% 0.135 279.6) |
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 #5B5DB4 | 5.72:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #5B5DB4 | 3.66:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #5B5DB4 text on white | 5.72:1 | AA | Lc 78.4 | Fine for body text |
| #5B5DB4 text on black | 3.66:1 | AA large text | Lc -23.3 | 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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F1
oklch(88.5% 0.036 280.4)
-
Step 300
300
#B7BDEB
oklch(80.9% 0.065 279)
-
Step 400
400
#9399E1
oklch(70.6% 0.105 279.7)
-
Step 500
500
#7A7FD8
oklch(63.2% 0.133 279.4)
-
Step 600
600
#6466C5
oklch(55.5% 0.144 279.7)
-
Step 700
700 (this color)
#5B5DB4
oklch(52% 0.135 279.6)
-
Step 800
800
#44458A
oklch(42.6% 0.112 279.9)
-
Step 900
900
#393B6E
oklch(37.7% 0.086 279.7)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#5B5DB4 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) | #376AB7 | 0.050 |
| Deuteranopia (no green cones) | #2F63B2 | 0.051 |
| Tritanopia (no blue cones) | #397080 | 0.117 |
| Achromatopsia (no color) | #666666 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5DB4
#5B5DB4
oklch(52% 0.135 279.6)
- #786900
#786900
oklch(51.9% 0.108 99.4)
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 #5B5DB4, closest first.
No curated palette has a color within ΔE 0.04 of #5B5DB4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.046
- French Blue #436BAD ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.048
- Light Indigo #6D5ACF ΔE 0.051
- Dusky Blue #475F94 ΔE 0.060
- Mid Blue #276AB3 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.068
Use #5B5DB4 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.