#515AAC
Closest named color: Dusky Blue (#475F94). oklch(50.2% 0.129 276), rgb(81, 90, 172).
Aa
White text reads best on this color (6.16:1).
About this color
#515AAC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.129 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.046 away. White text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #515AAC |
| RGB | rgb(81, 90, 172) |
| HSL | hsl(234, 36%, 50%) |
| OKLCH | oklch(50.2% 0.129 276) |
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 #515AAC | 6.16:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #515AAC | 3.40:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #515AAC text on white | 6.16:1 | AA | Lc 80.6 | Fine for body text |
| #515AAC text on black | 3.40:1 | AA large text | Lc -21.3 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEA
oklch(80.9% 0.063 275.9)
-
Step 400
400
#8F9BDF
oklch(70.6% 0.101 275.8)
-
Step 500
500
#7581D6
oklch(63.1% 0.128 276)
-
Step 600
600
#5F69C3
oklch(55.6% 0.139 276.2)
-
Step 700
700 (this color)
#515AAC
oklch(50.2% 0.129 276)
-
Step 800
800
#404789
oklch(42.6% 0.108 276.2)
-
Step 900
900
#363C6D
oklch(37.6% 0.084 276.3)
-
Step 950
950
#202440
oklch(27.1% 0.052 276.2)
#515AAC 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) | #3565AF | 0.040 |
| Deuteranopia (no green cones) | #2B5EAA | 0.043 |
| Tritanopia (no blue cones) | #296C7B | 0.113 |
| Achromatopsia (no color) | #616161 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515AAC
#515AAC
oklch(50.2% 0.129 276)
- #756300
#756300
oklch(50.2% 0.103 96.6)
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 #515AAC, closest first.
No curated palette has a color within ΔE 0.04 of #515AAC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.046
- Iris #6258C4 ΔE 0.046
- French Blue #436BAD ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.052
- Mid Blue #276AB3 ΔE 0.055
- Twilight #4E518B ΔE 0.055
- Slate Blue #6A5ACD ΔE 0.064
- Dark Periwinkle #665FD1 ΔE 0.067
Use #515AAC 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.