#515CC1
Closest named color: Iris (#6258C4). oklch(52% 0.157 274.9), rgb(81, 92, 193).
Aa
White text reads best on this color (5.75:1).
About this color
#515CC1 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.157 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 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.65:1 |
| White text | 5.75:1 |
Values
| HEX | #515CC1 |
| RGB | rgb(81, 92, 193) |
| HSL | hsl(234, 47%, 54%) |
| OKLCH | oklch(52% 0.157 274.9) |
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 #515CC1 | 5.75:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #515CC1 | 3.65:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #515CC1 text on white | 5.75:1 | AA | Lc 78.5 | Fine for body text |
| #515CC1 text on black | 3.65:1 | AA large text | Lc -23.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
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
#B2BDF2
oklch(80.8% 0.076 275.5)
-
Step 400
400
#8B9AEC
oklch(70.8% 0.121 275)
-
Step 500
500
#6F7EE6
oklch(63% 0.156 274.8)
-
Step 600
600
#5965D4
oklch(55.6% 0.169 274.8)
-
Step 700
700 (this color)
#515CC1
oklch(52% 0.157 274.9)
-
Step 800
800
#3C4594
oklch(42.7% 0.129 274.7)
-
Step 900
900
#333B76
oklch(37.8% 0.1 274.8)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#515CC1 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) | #226BC5 | 0.053 |
| Deuteranopia (no green cones) | #0361BF | 0.058 |
| Tritanopia (no blue cones) | #007385 | 0.139 |
| Achromatopsia (no color) | #666666 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515CC1
#515CC1
oklch(52% 0.157 274.9)
- #7C6700
#7C6700
oklch(51.9% 0.107 94.9)
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 #515CC1, 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 0.040
- Slate Blue #6A5ACD ΔE 0.041
- Warm Blue #4B57DB ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.047
- French Blue #436BAD ΔE 0.056
- Royal Blue #4169E1 ΔE 0.057
- Mid Blue #276AB3 ΔE 0.059
Use #515CC1 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.