#515AE5
Closest named color: Warm Blue (#4B57DB). oklch(54.4% 0.207 274.4), rgb(81, 90, 229).
Aa
White text reads best on this color (5.32:1).
About this color
#515AE5 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.207 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.019 away. White text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.94:1 |
| White text | 5.32:1 |
Values
| HEX | #515AE5 |
| RGB | rgb(81, 90, 229) |
| HSL | hsl(236, 74%, 61%) |
| OKLCH | oklch(54.4% 0.207 274.4) |
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 #515AE5 | 5.32:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #515AE5 | 3.94:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #515AE5 text on white | 5.32:1 | AA | Lc 76.0 | Fine for body text |
| #515AE5 text on black | 3.94:1 | AA large text | Lc -25.8 | 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
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CED7FC
oklch(88.4% 0.052 274.5)
-
Step 300
300
#AEBDFD
oklch(81% 0.092 274)
-
Step 400
400
#8597FD
oklch(70.7% 0.15 274.4)
-
Step 500
500
#6A79FA
oklch(63% 0.191 274.6)
-
Step 600
600 (this color)
#515AE5
oklch(54.4% 0.207 274.4)
-
Step 700
700
#454CCB
oklch(49% 0.193 274.3)
-
Step 800
800
#3840A4
oklch(42.8% 0.159 274)
-
Step 900
900
#303782
oklch(37.6% 0.125 274.7)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#515AE5 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) | #0072EA | 0.068 |
| Deuteranopia (no green cones) | #0065E2 | 0.056 |
| Tritanopia (no blue cones) | #007D97 | 0.171 |
| Achromatopsia (no color) | #6B6B6B | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515AE5
#515AE5
oklch(54.4% 0.207 274.4)
- #856E00
#856E00
oklch(54.4% 0.112 94.4)
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 #515AE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.019
- Neon Blue #4361EE ΔE 0.024
- Royal Blue #4169E1 ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.045
- Azul #1D5DEC ΔE 0.047
- Slate Blue #6A5ACD ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.053
- Iris #6258C4 ΔE 0.056
Use #515AE5 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.