#5159B3
Closest named color: Iris (#6258C4). oklch(50.4% 0.141 276.3), rgb(81, 89, 179).
Aa
White text reads best on this color (6.12:1).
About this color
#5159B3 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.141 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.037 away. White text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.42:1 |
| White text | 6.12:1 |
Values
| HEX | #5159B3 |
| RGB | rgb(81, 89, 179) |
| HSL | hsl(235, 39%, 51%) |
| OKLCH | oklch(50.4% 0.141 276.3) |
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 #5159B3 | 6.12:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #5159B3 | 3.42:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #5159B3 text on white | 6.12:1 | AA | Lc 80.3 | Fine for body text |
| #5159B3 text on black | 3.42:1 | AA large text | Lc -21.5 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F3
oklch(88.6% 0.038 275.7)
-
Step 300
300
#B4BDED
oklch(80.8% 0.069 276.5)
-
Step 400
400
#8E9AE4
oklch(70.6% 0.109 276.2)
-
Step 500
500
#7480DC
oklch(63.2% 0.138 276.1)
-
Step 600
600
#5E67CA
oklch(55.6% 0.151 276.4)
-
Step 700
700 (this color)
#5159B3
oklch(50.4% 0.141 276.3)
-
Step 800
800
#3F468D
oklch(42.6% 0.116 276.1)
-
Step 900
900
#353B71
oklch(37.6% 0.092 276.3)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#5159B3 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) | #2C66B6 | 0.048 |
| Deuteranopia (no green cones) | #1F5EB1 | 0.051 |
| Tritanopia (no blue cones) | #216D7D | 0.124 |
| Achromatopsia (no color) | #626262 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5159B3
#5159B3
oklch(50.4% 0.141 276.3)
- #766300
#766300
oklch(50.3% 0.103 95.9)
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 #5159B3, closest first.
No curated palette has a color within ΔE 0.04 of #5159B3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.037
- French Blue #436BAD ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.056
- Dusky Blue #475F94 ΔE 0.057
- Mid Blue #276AB3 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.058
- Light Indigo #6D5ACF ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.062
Use #5159B3 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.