#6F51C8
Closest named color: Slate Blue (#6A5ACD). oklch(52.9% 0.177 290.7), rgb(111, 81, 200).
Aa
White text reads best on this color (5.69:1).
About this color
#6F51C8 is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.177 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.022 away. White text reads best on it, at 5.69:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #6F51C8 |
| RGB | rgb(111, 81, 200) |
| HSL | hsl(255, 52%, 55%) |
| OKLCH | oklch(52.9% 0.177 290.7) |
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 #6F51C8 | 5.69:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #6F51C8 | 3.68:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #6F51C8 text on white | 5.69:1 | AA | Lc 78.1 | Fine for body text |
| #6F51C8 text on black | 3.68:1 | AA large text | Lc -23.7 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D8D5F5
oklch(88.5% 0.044 289.8)
-
Step 300
300
#C0B8F1
oklch(80.9% 0.08 290.9)
-
Step 400
400
#A192EA
oklch(70.8% 0.127 290.6)
-
Step 500
500
#8B74E3
oklch(63.1% 0.162 290.5)
-
Step 600
600 (this color)
#6F51C8
oklch(52.9% 0.177 290.7)
-
Step 700
700
#6448B5
oklch(49.1% 0.165 290.9)
-
Step 800
800
#513C92
oklch(42.6% 0.136 290.7)
-
Step 900
900
#433475
oklch(37.7% 0.107 291)
-
Step 950
950
#271F44
oklch(26.9% 0.067 291.2)
#6F51C8 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) | #0069CC | 0.108 |
| Deuteranopia (no green cones) | #0064C5 | 0.107 |
| Tritanopia (no blue cones) | #556C85 | 0.143 |
| Achromatopsia (no color) | #676767 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6F51C8
#6F51C8
oklch(52.9% 0.177 290.7)
- #6F7100
#6F7100
oklch(52.9% 0.116 111)
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 #6F51C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.022
- Light Indigo #6D5ACF ΔE 0.022
- Iris #6258C4 ΔE 0.026
- Dark Periwinkle #665FD1 ΔE 0.035
- Bluey Purple #6241C7 ΔE 0.043
- Purpley #8756E4 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
Use #6F51C8 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.