#5159CE
Closest named color: Warm Blue (#4B57DB). oklch(52.4% 0.178 275.4), rgb(81, 89, 206).
Aa
White text reads best on this color (5.72:1).
About this color
#5159CE is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.178 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.022 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.67:1 |
| White text | 5.72:1 |
Values
| HEX | #5159CE |
| RGB | rgb(81, 89, 206) |
| HSL | hsl(236, 56%, 56%) |
| OKLCH | oklch(52.4% 0.178 275.4) |
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 #5159CE | 5.72:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #5159CE | 3.67:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #5159CE text on white | 5.72:1 | AA | Lc 78.2 | Fine for body text |
| #5159CE text on black | 3.67:1 | AA large text | Lc -23.5 | 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 600.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D7F7
oklch(88.4% 0.045 275.7)
-
Step 300
300
#B1BDF5
oklch(80.9% 0.08 275.1)
-
Step 400
400
#8A99F0
oklch(70.7% 0.128 275.2)
-
Step 500
500
#6F7DEB
oklch(63.1% 0.164 275.2)
-
Step 600
600 (this color)
#5159CE
oklch(52.4% 0.178 275.4)
-
Step 700
700
#4A51BC
oklch(49.1% 0.166 275.6)
-
Step 800
800
#3C4398
oklch(42.6% 0.137 275.4)
-
Step 900
900
#333A79
oklch(37.8% 0.106 275.3)
-
Step 950
950
#1E2247
oklch(27% 0.068 276.2)
#5159CE 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) | #006CD2 | 0.065 |
| Deuteranopia (no green cones) | #0061CC | 0.059 |
| Tritanopia (no blue cones) | #00758B | 0.152 |
| Achromatopsia (no color) | #666666 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5159CE
#5159CE
oklch(52.4% 0.178 275.4)
- #7D6900
#7D6900
oklch(52.4% 0.108 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 #5159CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.022
- Iris #6258C4 ΔE 0.029
- Dark Periwinkle #665FD1 ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.037
- Light Indigo #6D5ACF ΔE 0.042
- Royal Blue #4169E1 ΔE 0.047
- Neon Blue #4361EE ΔE 0.053
- Bluey Purple #6241C7 ΔE 0.056
Use #5159CE 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.