#6C7699
Closest named color: Grey Blue (#647D8E). oklch(57.1% 0.055 272.2), rgb(108, 118, 153).
Aa
Black text reads best on this color (4.68:1).
About this color
#6C7699 is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.055 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.032 away. Black text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.68:1 |
| White text | 4.47:1 |
Values
| HEX | #6C7699 |
| RGB | rgb(108, 118, 153) |
| HSL | hsl(227, 18%, 51%) |
| OKLCH | oklch(57.1% 0.055 272.2) |
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 #6C7699 | 4.47:1 | AA large text | Lc -76.6 | Fine for body text |
| Black text on #6C7699 | 4.68:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #6C7699 text on white | 4.47:1 | AA large text | Lc 71.1 | Content text, not long reading |
| #6C7699 text on black | 4.68:1 | AA | Lc -30.6 | Non-text elements, placeholder text |
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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D6D9E3
oklch(88.6% 0.014 272.7)
-
Step 300
300
#BBC0D1
oklch(80.9% 0.024 272.8)
-
Step 400
400
#98A0BA
oklch(70.8% 0.039 271.9)
-
Step 500
500
#7E88A9
oklch(63.1% 0.051 271.7)
-
Step 600
600 (this color)
#6C7699
oklch(57.1% 0.055 272.2)
-
Step 700
700
#565F7F
oklch(49.1% 0.053 272.2)
-
Step 800
800
#474E67
oklch(42.8% 0.043 272.4)
-
Step 900
900
#3B4154
oklch(37.8% 0.034 271.1)
-
Step 950
950
#232631
oklch(27% 0.021 273)
#6C7699 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) | #6B799B | 0.008 |
| Deuteranopia (no green cones) | #687598 | 0.007 |
| Tritanopia (no blue cones) | #607D82 | 0.050 |
| Achromatopsia (no color) | #777777 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C7699
#6C7699
oklch(57.1% 0.055 272.2)
- #837752
#837752
oklch(57.1% 0.055 92.2)
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 #6C7699, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.032
- Stormy Blue #507B9C ΔE 0.036
- Slate Gray #708090 ΔE 0.037
- Lavender Gray #7E7F9A ΔE 0.039
- Grey Purple #826D8C ΔE 0.040
- Battleship Grey #6B7C85 ΔE 0.041
- Battleship Gray #6C757D ΔE 0.044
- Metallic Blue #4F738E ΔE 0.044
Use #6C7699 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.