#515BC0
Closest named color: Iris (#6258C4). oklch(51.7% 0.156 275.3), rgb(81, 91, 192).
Aa
White text reads best on this color (5.82:1).
About this color
#515BC0 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.156 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.026 away. White text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.60:1 |
| White text | 5.82:1 |
Values
| HEX | #515BC0 |
| RGB | rgb(81, 91, 192) |
| HSL | hsl(235, 47%, 54%) |
| OKLCH | oklch(51.7% 0.156 275.3) |
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 #515BC0 | 5.82:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #515BC0 | 3.60:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #515BC0 text on white | 5.82:1 | AA | Lc 78.8 | Fine for body text |
| #515BC0 text on black | 3.60:1 | AA large text | Lc -23.0 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D8F6
oklch(88.6% 0.042 275.1)
-
Step 300
300
#B2BDF2
oklch(80.8% 0.076 275.5)
-
Step 400
400
#8B9AEC
oklch(70.8% 0.121 275)
-
Step 500
500
#707EE5
oklch(63% 0.154 275.2)
-
Step 600
600
#5A65D4
oklch(55.7% 0.169 275.2)
-
Step 700
700 (this color)
#515BC0
oklch(51.7% 0.156 275.3)
-
Step 800
800
#3D4594
oklch(42.8% 0.128 275.2)
-
Step 900
900
#333B76
oklch(37.8% 0.1 274.8)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#515BC0 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) | #206AC4 | 0.054 |
| Deuteranopia (no green cones) | #0061BE | 0.059 |
| Tritanopia (no blue cones) | #037285 | 0.137 |
| Achromatopsia (no color) | #656565 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515BC0
#515BC0
oklch(51.7% 0.156 275.3)
- #7B6700
#7B6700
oklch(51.8% 0.106 95.6)
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 #515BC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.026
- Dark Periwinkle #665FD1 ΔE 0.042
- Slate Blue #6A5ACD ΔE 0.042
- Warm Blue #4B57DB ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.048
- French Blue #436BAD ΔE 0.057
- Royal Blue #4169E1 ΔE 0.059
- Mid Blue #276AB3 ΔE 0.059
Use #515BC0 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.