#515DCC
Closest named color: Iris (#6258C4). oklch(53% 0.17 274.4), rgb(81, 93, 204).
Aa
White text reads best on this color (5.54:1).
About this color
#515DCC is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.170 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.028 away. White text reads best on it, at 5.54:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #515DCC |
| RGB | rgb(81, 93, 204) |
| HSL | hsl(234, 55%, 56%) |
| OKLCH | oklch(53% 0.17 274.4) |
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 #515DCC | 5.54:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #515DCC | 3.78:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #515DCC text on white | 5.54:1 | AA | Lc 77.4 | Fine for body text |
| #515DCC text on black | 3.78:1 | AA large text | Lc -24.4 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B1BEF3
oklch(81% 0.076 273.9)
-
Step 400
400
#8A9AED
oklch(70.8% 0.123 274.5)
-
Step 500
500
#6E7EE7
oklch(63% 0.158 274.5)
-
Step 600
600 (this color)
#515DCC
oklch(53% 0.17 274.4)
-
Step 700
700
#4853B9
oklch(49.1% 0.159 274.3)
-
Step 800
800
#3B4595
oklch(42.7% 0.13 274.2)
-
Step 900
900
#323B77
oklch(37.8% 0.102 274.1)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#515DCC 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) | #0D6ED0 | 0.060 |
| Deuteranopia (no green cones) | #0063CA | 0.057 |
| Tritanopia (no blue cones) | #00778B | 0.147 |
| Achromatopsia (no color) | #686868 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515DCC
#515DCC
oklch(53% 0.17 274.4)
- #806A00
#806A00
oklch(53% 0.109 94.6)
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 #515DCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.028
- Warm Blue #4B57DB ΔE 0.029
- Dark Periwinkle #665FD1 ΔE 0.032
- Slate Blue #6A5ACD ΔE 0.036
- Light Indigo #6D5ACF ΔE 0.041
- Royal Blue #4169E1 ΔE 0.043
- Neon Blue #4361EE ΔE 0.054
- Bluey Purple #6241C7 ΔE 0.064
Use #515DCC 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.