#6757CB
Closest named color: Slate Blue (#6A5ACD). oklch(53.4% 0.173 285.2), rgb(103, 87, 203).
Aa
White text reads best on this color (5.52:1).
About this color
#6757CB is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.173 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.009 away. White text reads best on it, at 5.52:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.80:1 |
| White text | 5.52:1 |
Values
| HEX | #6757CB |
| RGB | rgb(103, 87, 203) |
| HSL | hsl(248, 53%, 57%) |
| OKLCH | oklch(53.4% 0.173 285.2) |
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 #6757CB | 5.52:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #6757CB | 3.80:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #6757CB text on white | 5.52:1 | AA | Lc 77.2 | Fine for body text |
| #6757CB text on black | 3.80:1 | AA large text | Lc -24.5 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D6F5
oklch(88.6% 0.042 285.5)
-
Step 300
300
#BBBAF2
oklch(80.9% 0.079 285.3)
-
Step 400
400
#9994EB
oklch(70.6% 0.126 285.3)
-
Step 500
500
#8278E4
oklch(63.2% 0.158 285.1)
-
Step 600
600 (this color)
#6757CB
oklch(53.4% 0.173 285.2)
-
Step 700
700
#5B4CB6
oklch(49% 0.161 285.2)
-
Step 800
800
#4A3F93
oklch(42.6% 0.133 285.2)
-
Step 900
900
#3E3775
oklch(37.8% 0.103 285.5)
-
Step 950
950
#242145
oklch(27.1% 0.065 285)
#6757CB 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) | #006CCF | 0.092 |
| Deuteranopia (no green cones) | #0065C9 | 0.090 |
| Tritanopia (no blue cones) | #437188 | 0.146 |
| Achromatopsia (no color) | #696969 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6757CB
#6757CB
oklch(53.4% 0.173 285.2)
- #777000
#777000
oklch(53.4% 0.114 105.3)
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 #6757CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.009
- Iris #6258C4 ΔE 0.014
- Light Indigo #6D5ACF ΔE 0.014
- Dark Periwinkle #665FD1 ΔE 0.020
- Warm Blue #4B57DB ΔE 0.047
- Bluey Purple #6241C7 ΔE 0.049
- Purpley #8756E4 ΔE 0.065
- Royal Blue #4169E1 ΔE 0.066
Use #6757CB 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.