#677F8E
Closest named color: Grey Blue (#647D8E). oklch(58.3% 0.036 235.7), rgb(103, 127, 142).
Aa
Black text reads best on this color (5.00:1).
About this color
#677F8E is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.036 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.007 away. Black text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #677F8E |
| RGB | rgb(103, 127, 142) |
| HSL | hsl(203, 16%, 48%) |
| OKLCH | oklch(58.3% 0.036 235.7) |
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 #677F8E | 4.19:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #677F8E | 5.00:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #677F8E text on white | 4.19:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #677F8E text on black | 5.00:1 | AA | Lc -32.7 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D4DADE
oklch(88.5% 0.009 236.6)
-
Step 300
300
#B7C2CA
oklch(80.8% 0.017 239.2)
-
Step 400
400
#92A4AF
oklch(70.8% 0.026 234.6)
-
Step 500
500
#778D9B
oklch(63.1% 0.033 236)
-
Step 600
600 (this color)
#677F8E
oklch(58.3% 0.036 235.7)
-
Step 700
700
#4F6471
oklch(49.1% 0.033 235.5)
-
Step 800
800
#41525C
oklch(42.8% 0.027 234.1)
-
Step 900
900
#37444C
oklch(37.8% 0.022 235.2)
-
Step 950
950
#20282C
oklch(27.1% 0.014 229.5)
#677F8E 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) | #787E8F | 0.023 |
| Deuteranopia (no green cones) | #737A8E | 0.021 |
| Tritanopia (no blue cones) | #5B8384 | 0.027 |
| Achromatopsia (no color) | #7C7C7C | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677F8E
#677F8E
oklch(58.3% 0.036 235.7)
- #8D7667
#8D7667
oklch(58.3% 0.036 55)
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 #677F8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.007
- Slate Gray #708090 ΔE 0.013
- Battleship Grey #6B7C85 ΔE 0.014
- Steel Grey #6F828A ΔE 0.017
- Steel #738595 ΔE 0.026
- Battleship Gray #6C757D ΔE 0.032
- Light Slate Gray #778899 ΔE 0.037
- Lavender Gray #7E7F9A ΔE 0.039
Use #677F8E 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.