#688B91
Closest named color: Steel (#738595). oklch(61.3% 0.04 209.2), rgb(104, 139, 145).
Aa
Black text reads best on this color (5.69:1).
About this color
#688B91 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.040 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Steel (#738595), ΔE 0.024 away. Black text reads best on it, at 5.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.69:1 |
| White text | 3.69:1 |
Values
| HEX | #688B91 |
| RGB | rgb(104, 139, 145) |
| HSL | hsl(189, 16%, 49%) |
| OKLCH | oklch(61.3% 0.04 209.2) |
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 #688B91 | 3.69:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #688B91 | 5.69:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #688B91 text on white | 3.69:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #688B91 text on black | 5.69:1 | AA | Lc -37.2 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B3C4C7
oklch(80.8% 0.019 209.4)
-
Step 400
400
#8BA6AB
oklch(70.6% 0.031 210.1)
-
Step 500
500 (this color)
#688B91
oklch(61.3% 0.04 209.2)
-
Step 600
600
#557B81
oklch(55.7% 0.044 208.3)
-
Step 700
700
#45676D
oklch(49% 0.04 209.7)
-
Step 800
800
#395459
oklch(42.6% 0.033 210.3)
-
Step 900
900
#314649
oklch(37.8% 0.027 207.1)
-
Step 950
950
#1D292B
oklch(27.1% 0.017 208.8)
#688B91 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) | #858891 | 0.039 |
| Deuteranopia (no green cones) | #7E8391 | 0.035 |
| Tritanopia (no blue cones) | #5A8E8D | 0.020 |
| Achromatopsia (no color) | #858585 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688B91
#688B91
oklch(61.3% 0.04 209.2)
- #9B7B76
#9B7B76
oklch(61.2% 0.041 28.6)
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 #688B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel #738595 ΔE 0.024
- Steel Grey #6F828A ΔE 0.025
- Light Slate Gray #778899 ΔE 0.026
- Slate Gray #708090 ΔE 0.032
- Blue Grey #758DA3 ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.041
- Grey Blue #647D8E ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.042
Use #688B91 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.