#677F9B
Closest named color: Grey Blue (#647D8E). oklch(58.8% 0.051 252.6), rgb(103, 127, 155).
Aa
Black text reads best on this color (5.08:1).
About this color
#677F9B is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.051 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.021 away. Black text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.08:1 |
| White text | 4.12:1 |
Values
| HEX | #677F9B |
| RGB | rgb(103, 127, 155) |
| HSL | hsl(212, 21%, 51%) |
| OKLCH | oklch(58.8% 0.051 252.6) |
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 #677F9B | 4.12:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #677F9B | 5.08:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #677F9B text on white | 4.12:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #677F9B text on black | 5.08:1 | AA | Lc -33.3 | 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
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B6C2D0
oklch(80.9% 0.024 252.2)
-
Step 400
400
#91A3B8
oklch(70.8% 0.037 252.4)
-
Step 500
500
#758CA6
oklch(63.1% 0.047 251.7)
-
Step 600
600 (this color)
#677F9B
oklch(58.8% 0.051 252.6)
-
Step 700
700
#4D637C
oklch(49.2% 0.048 252)
-
Step 800
800
#3F5164
oklch(42.8% 0.039 250.1)
-
Step 900
900
#364352
oklch(37.8% 0.031 252.3)
-
Step 950
950
#202730
oklch(27% 0.02 254.8)
#677F9B 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) | #75809C | 0.020 |
| Deuteranopia (no green cones) | #6F7A9A | 0.017 |
| Tritanopia (no blue cones) | #578588 | 0.044 |
| Achromatopsia (no color) | #7D7D7D | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677F9B
#677F9B
oklch(58.8% 0.051 252.6)
- #90785B
#90785B
oklch(58.8% 0.051 71.8)
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 #677F9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.021
- Slate Gray #708090 ΔE 0.021
- Steel #738595 ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.031
- Stormy Blue #507B9C ΔE 0.032
- Lavender Gray #7E7F9A ΔE 0.032
- Steel Grey #6F828A ΔE 0.032
- Off Blue #5684AE ΔE 0.032
Use #677F9B 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.