#5157DB
Closest named color: Warm Blue (#4B57DB). oklch(53% 0.198 275.4), rgb(81, 87, 219).
Aa
White text reads best on this color (5.62:1).
About this color
#5157DB is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.198 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.008 away. White text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #5157DB |
| RGB | rgb(81, 87, 219) |
| HSL | hsl(237, 66%, 59%) |
| OKLCH | oklch(53% 0.198 275.4) |
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 #5157DB | 5.62:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #5157DB | 3.73:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #5157DB text on white | 5.62:1 | AA | Lc 77.6 | Fine for body text |
| #5157DB text on black | 3.73:1 | AA large text | Lc -24.2 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#B0BCFB
oklch(80.9% 0.09 275.9)
-
Step 400
400
#8897F8
oklch(70.6% 0.142 275.5)
-
Step 500
500
#6D7AF5
oklch(63.1% 0.182 275.4)
-
Step 600
600 (this color)
#5157DB
oklch(53% 0.198 275.4)
-
Step 700
700
#484EC6
oklch(49.2% 0.183 275.2)
-
Step 800
800
#3B40A0
oklch(42.6% 0.153 275.5)
-
Step 900
900
#32387F
oklch(37.7% 0.118 275.5)
-
Step 950
950
#1D214A
oklch(26.9% 0.075 275.9)
#5157DB 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) | #006EDF | 0.069 |
| Deuteranopia (no green cones) | #0061D8 | 0.058 |
| Tritanopia (no blue cones) | #007891 | 0.165 |
| Achromatopsia (no color) | #676767 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5157DB
#5157DB
oklch(53% 0.198 275.4)
- #7F6A00
#7F6A00
oklch(52.9% 0.109 95.3)
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 #5157DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.008
- Neon Blue #4361EE ΔE 0.038
- Dark Periwinkle #665FD1 ΔE 0.041
- Royal Blue #4169E1 ΔE 0.043
- Iris #6258C4 ΔE 0.043
- Slate Blue #6A5ACD ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.047
- Azul #1D5DEC ΔE 0.053
Use #5157DB 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.