#688BA1
Closest named color: Blue Grey (#758DA3). oklch(61.9% 0.051 236.3), rgb(104, 139, 161).
Aa
Black text reads best on this color (5.79:1).
About this color
#688BA1 is a medium-dark, muted blue. In OKLCH its lightness is 62%, its chroma 0.051 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.018 away. Black text reads best on it, at 5.79:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #688BA1 |
| RGB | rgb(104, 139, 161) |
| HSL | hsl(203, 23%, 52%) |
| OKLCH | oklch(61.9% 0.051 236.3) |
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 #688BA1 | 3.62:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #688BA1 | 5.79:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #688BA1 text on white | 3.62:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #688BA1 text on black | 5.79:1 | AA | Lc -37.9 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B2C4CF
oklch(81% 0.025 234.5)
-
Step 400
400
#89A5B7
oklch(70.7% 0.041 236.4)
-
Step 500
500 (this color)
#688BA1
oklch(61.9% 0.051 236.3)
-
Step 600
600
#537990
oklch(55.7% 0.056 235.7)
-
Step 700
700
#43667B
oklch(49.2% 0.052 235.7)
-
Step 800
800
#385364
oklch(42.8% 0.043 236.8)
-
Step 900
900
#304551
oklch(37.8% 0.033 233.9)
-
Step 950
950
#1C2830
oklch(26.9% 0.022 237.9)
#688BA1 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) | #818AA2 | 0.033 |
| Deuteranopia (no green cones) | #7984A1 | 0.028 |
| Tritanopia (no blue cones) | #559192 | 0.040 |
| Achromatopsia (no color) | #868686 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688BA1
#688BA1
oklch(61.9% 0.051 236.3)
- #9E7E68
#9E7E68
oklch(61.8% 0.051 56.1)
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 #688BA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.018
- Light Slate Gray #778899 ΔE 0.021
- Steel #738595 ΔE 0.023
- Silver Lake Blue #778DA9 ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.031
- Slate Gray #708090 ΔE 0.034
- Steel Grey #6F828A ΔE 0.036
- Off Blue #5684AE ΔE 0.039
Use #688BA1 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.