#5151BE
Closest named color: Iris (#6258C4). oklch(49.7% 0.167 278.4), rgb(81, 81, 190).
Aa
White text reads best on this color (6.42:1).
About this color
#5151BE is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.167 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.034 away. White text reads best on it, at 6.42:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.27:1 |
| White text | 6.42:1 |
Values
| HEX | #5151BE |
| RGB | rgb(81, 81, 190) |
| HSL | hsl(240, 46%, 53%) |
| OKLCH | oklch(49.7% 0.167 278.4) |
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 #5151BE | 6.42:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #5151BE | 3.27:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #5151BE text on white | 6.42:1 | AA | Lc 81.5 | Fine for body text |
| #5151BE text on black | 3.27:1 | AA large text | Lc -20.3 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F7
oklch(88.5% 0.044 278.4)
-
Step 300
300
#B4BCF5
oklch(80.9% 0.081 278.2)
-
Step 400
400
#8F97F0
oklch(70.7% 0.13 278.6)
-
Step 500
500
#757BEA
oklch(63.1% 0.164 278.3)
-
Step 600
600
#6061D9
oklch(55.7% 0.179 278.5)
-
Step 700
700 (this color)
#5151BE
oklch(49.7% 0.167 278.4)
-
Step 800
800
#414298
oklch(42.8% 0.137 278.4)
-
Step 900
900
#363879
oklch(37.6% 0.108 278.5)
-
Step 950
950
#202247
oklch(27.1% 0.068 278.5)
#5151BE 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) | #0063C2 | 0.069 |
| Deuteranopia (no green cones) | #005ABC | 0.065 |
| Tritanopia (no blue cones) | #0F6B7F | 0.146 |
| Achromatopsia (no color) | #5F5F5F | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5151BE
#5151BE
oklch(49.7% 0.167 278.4)
- #726200
#726200
oklch(49.7% 0.103 98)
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 #5151BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.034
- Bluey Purple #6241C7 ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.047
- Warm Blue #4B57DB ΔE 0.047
- Slate Blue #6A5ACD ΔE 0.051
- Blurple #5539CC ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.056
- Light Indigo #6D5ACF ΔE 0.056
Use #5151BE 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.