#688391
Closest named color: Slate Gray (#708090). oklch(59.4% 0.038 230.7), rgb(104, 131, 145).
Aa
Black text reads best on this color (5.24:1).
About this color
#688391 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.038 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Gray (#708090), ΔE 0.013 away. Black text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #688391 |
| RGB | rgb(104, 131, 145) |
| HSL | hsl(200, 16%, 49%) |
| OKLCH | oklch(59.4% 0.038 230.7) |
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 #688391 | 4.00:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #688391 | 5.24:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #688391 text on white | 4.00:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #688391 text on black | 5.24:1 | AA | Lc -34.3 | 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 500.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B5C3CA
oklch(80.9% 0.018 229.1)
-
Step 400
400
#8FA4B0
oklch(70.6% 0.029 232.9)
-
Step 500
500 (this color)
#688391
oklch(59.4% 0.038 230.7)
-
Step 600
600
#5B7887
oklch(55.6% 0.041 230.9)
-
Step 700
700
#4B6573
oklch(49.1% 0.038 232)
-
Step 800
800
#3D525D
oklch(42.6% 0.032 231.2)
-
Step 900
900
#34444C
oklch(37.6% 0.025 229.8)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#688391 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) | #7C8292 | 0.027 |
| Deuteranopia (no green cones) | #767D91 | 0.024 |
| Tritanopia (no blue cones) | #5B8787 | 0.028 |
| Achromatopsia (no color) | #7F7F7F | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688391
#688391
oklch(59.4% 0.038 230.7)
- #92786A
#92786A
oklch(59.3% 0.039 49.9)
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 #688391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.013
- Steel Grey #6F828A ΔE 0.013
- Steel #738595 ΔE 0.017
- Grey Blue #647D8E ΔE 0.018
- Battleship Grey #6B7C85 ΔE 0.023
- Light Slate Gray #778899 ΔE 0.028
- Lavender Gray #7E7F9A ΔE 0.037
- Gray #808080 ΔE 0.038
Use #688391 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.