#515EEE
Closest named color: Neon Blue (#4361EE). oklch(55.8% 0.214 273.3), rgb(81, 94, 238).
Aa
White text reads best on this color (5.01:1).
About this color
#515EEE is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.214 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.016 away. White text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.214) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #515EEE |
| RGB | rgb(81, 94, 238) |
| HSL | hsl(235, 82%, 63%) |
| OKLCH | oklch(55.8% 0.214 273.3) |
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 #515EEE | 5.01:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #515EEE | 4.18:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #515EEE text on white | 5.01:1 | AA | Lc 74.1 | Content text, not long reading |
| #515EEE text on black | 4.18:1 | AA large text | Lc -27.6 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD7FD
oklch(88.4% 0.054 273.7)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8297FF
oklch(70.6% 0.154 273.2)
-
Step 500
500
#6679FE
oklch(63.1% 0.197 273.3)
-
Step 600
600 (this color)
#515EEE
oklch(55.8% 0.214 273.3)
-
Step 700
700
#424CCF
oklch(49.2% 0.199 273.2)
-
Step 800
800
#363FA7
oklch(42.7% 0.165 273.3)
-
Step 900
900
#2E3784
oklch(37.7% 0.128 273.5)
-
Step 950
950
#1A214D
oklch(26.9% 0.081 272.9)
#515EEE 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) | #0076F3 | 0.066 |
| Deuteranopia (no green cones) | #0068EB | 0.054 |
| Tritanopia (no blue cones) | #00829D | 0.175 |
| Achromatopsia (no color) | #6F6F6F | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515EEE
#515EEE
oklch(55.8% 0.214 273.3)
- #8B7100
#8B7100
oklch(55.8% 0.114 92.8)
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 #515EEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.016
- Warm Blue #4B57DB ΔE 0.034
- Royal Blue #4169E1 ΔE 0.035
- Azul #1D5DEC ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.053
- Bright Blue #0165FC ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.061
Use #515EEE 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.