#687B8A
Closest named color: Grey Blue (#647D8E). oklch(57.3% 0.032 242), rgb(104, 123, 138).
Aa
Black text reads best on this color (4.78:1).
About this color
#687B8A is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.032 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.008 away. Black text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #687B8A |
| RGB | rgb(104, 123, 138) |
| HSL | hsl(206, 14%, 47%) |
| OKLCH | oklch(57.3% 0.032 242) |
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 #687B8A | 4.38:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #687B8A | 4.78:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #687B8A text on white | 4.38:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #687B8A text on black | 4.78:1 | AA | Lc -31.3 | 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
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D5DADE
oklch(88.6% 0.008 241.7)
-
Step 300
300
#B9C2C9
oklch(80.9% 0.014 241)
-
Step 400
400
#94A3AE
oklch(70.7% 0.023 239.6)
-
Step 500
500
#7A8C9A
oklch(63.1% 0.03 241.4)
-
Step 600
600 (this color)
#687B8A
oklch(57.3% 0.032 242)
-
Step 700
700
#526371
oklch(49.1% 0.031 243.2)
-
Step 800
800
#43515C
oklch(42.7% 0.025 241.9)
-
Step 900
900
#39434B
oklch(37.7% 0.019 242.3)
-
Step 950
950
#21272C
oklch(26.9% 0.013 243.3)
#687B8A 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) | #757B8B | 0.018 |
| Deuteranopia (no green cones) | #70778A | 0.015 |
| Tritanopia (no blue cones) | #5E7F80 | 0.026 |
| Achromatopsia (no color) | #787878 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #687B8A
#687B8A
oklch(57.3% 0.032 242)
- #877465
#877465
oklch(57.2% 0.033 60.4)
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 #687B8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.008
- Battleship Grey #6B7C85 ΔE 0.010
- Slate Gray #708090 ΔE 0.020
- Battleship Gray #6C757D ΔE 0.022
- Steel Grey #6F828A ΔE 0.024
- Steel #738595 ΔE 0.035
- Stormy Blue #507B9C ΔE 0.039
- Medium Grey #7D7F7C ΔE 0.040
Use #687B8A 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.