#515DBF
Closest named color: Iris (#6258C4). oklch(52% 0.152 274.6), rgb(81, 93, 191).
Aa
White text reads best on this color (5.72:1).
About this color
#515DBF is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.152 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.027 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #515DBF |
| RGB | rgb(81, 93, 191) |
| HSL | hsl(233, 46%, 53%) |
| OKLCH | oklch(52% 0.152 274.6) |
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 #515DBF | 5.72:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #515DBF | 3.66:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #515DBF text on white | 5.72:1 | AA | Lc 78.4 | Fine for body text |
| #515DBF text on black | 3.66:1 | AA large text | Lc -23.4 | 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 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
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B2BEF1
oklch(81% 0.073 274.3)
-
Step 400
400
#8B9AEA
oklch(70.7% 0.118 274.9)
-
Step 500
500
#6F7FE3
oklch(63% 0.15 274.4)
-
Step 600
600
#5966D1
oklch(55.6% 0.164 274.6)
-
Step 700
700 (this color)
#515DBF
oklch(52% 0.152 274.6)
-
Step 800
800
#3C4593
oklch(42.6% 0.127 274.7)
-
Step 900
900
#333B75
oklch(37.7% 0.099 274.8)
-
Step 950
950
#1E2344
oklch(27% 0.061 275)
#515DBF 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) | #286BC2 | 0.049 |
| Deuteranopia (no green cones) | #1162BD | 0.054 |
| Tritanopia (no blue cones) | #067385 | 0.134 |
| Achromatopsia (no color) | #666666 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515DBF
#515DBF
oklch(52% 0.152 274.6)
- #7D6700
#7D6700
oklch(52% 0.107 94.2)
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 #515DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.027
- Dark Periwinkle #665FD1 ΔE 0.042
- Slate Blue #6A5ACD ΔE 0.043
- Warm Blue #4B57DB ΔE 0.047
- Light Indigo #6D5ACF ΔE 0.048
- French Blue #436BAD ΔE 0.052
- Mid Blue #276AB3 ΔE 0.056
- Royal Blue #4169E1 ΔE 0.059
Use #515DBF 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.