#688FB9
Closest named color: Faded Blue (#658CBB). oklch(63.8% 0.077 250.9), rgb(104, 143, 185).
Aa
Black text reads best on this color (6.21:1).
About this color
#688FB9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.077 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.011 away. Black text reads best on it, at 6.21:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.21:1 |
| White text | 3.37:1 |
Values
| HEX | #688FB9 |
| RGB | rgb(104, 143, 185) |
| HSL | hsl(211, 37%, 57%) |
| OKLCH | oklch(63.8% 0.077 250.9) |
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 #688FB9 | 3.37:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #688FB9 | 6.21:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #688FB9 text on white | 3.37:1 | AA large text | Lc 61.2 | Content text, not long reading |
| #688FB9 text on black | 6.21:1 | AA | Lc -40.5 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3D9
oklch(80.9% 0.038 250.8)
-
Step 400
400
#85A4C5
oklch(70.7% 0.059 250.3)
-
Step 500
500 (this color)
#688FB9
oklch(63.8% 0.077 250.9)
-
Step 600
600
#4D77A3
oklch(55.7% 0.083 250.6)
-
Step 700
700
#3E638B
oklch(49% 0.077 251.4)
-
Step 800
800
#335171
oklch(42.6% 0.064 251)
-
Step 900
900
#2D435B
oklch(37.6% 0.05 251.3)
-
Step 950
950
#1B2836
oklch(27.2% 0.032 250.9)
#688FB9 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) | #7F90BB | 0.029 |
| Deuteranopia (no green cones) | #7588B8 | 0.023 |
| Tritanopia (no blue cones) | #49999D | 0.067 |
| Achromatopsia (no color) | #8C8C8C | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688FB9
#688FB9
oklch(63.8% 0.077 250.9)
- #A98456
#A98456
oklch(63.8% 0.077 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 #688FB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.011
- Silver Lake Blue #778DA9 ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.034
- Blue Grey #758DA3 ΔE 0.035
- Off Blue #5684AE ΔE 0.041
- Light Slate Gray #778899 ΔE 0.048
- Cool Blue #4984B8 ΔE 0.049
- Steel #738595 ΔE 0.054
Use #688FB9 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.