#688BD4
Closest named color: Soft Blue (#6488EA). oklch(64.2% 0.117 263.9), rgb(104, 139, 212).
Aa
Black text reads best on this color (6.23:1).
About this color
#688BD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.117 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.036 away. Black text reads best on it, at 6.23:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.23:1 |
| White text | 3.36:1 |
Values
| HEX | #688BD4 |
| RGB | rgb(104, 139, 212) |
| HSL | hsl(221, 56%, 62%) |
| OKLCH | oklch(64.2% 0.117 263.9) |
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 #688BD4 | 3.36:1 | AA large text | Lc -66.5 | Content text, not long reading |
| Black text on #688BD4 | 6.23:1 | AA | Lc 43.0 | Non-text elements, placeholder text |
| #688BD4 text on white | 3.36:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #688BD4 text on black | 6.23:1 | AA | Lc -40.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AEC1E7
oklch(80.9% 0.058 264.2)
-
Step 400
400
#83A0DA
oklch(70.6% 0.091 263.7)
-
Step 500
500 (this color)
#688BD4
oklch(64.2% 0.117 263.9)
-
Step 600
600
#4C70BD
oklch(55.5% 0.127 263.8)
-
Step 700
700
#3D5EA3
oklch(49.2% 0.117 263.4)
-
Step 800
800
#334D84
oklch(42.8% 0.097 263.7)
-
Step 900
900
#2C406A
oklch(37.6% 0.077 263.8)
-
Step 950
950
#1A263E
oklch(27% 0.048 263.3)
#688BD4 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) | #6F91D7 | 0.019 |
| Deuteranopia (no green cones) | #6287D2 | 0.014 |
| Tritanopia (no blue cones) | #369BA6 | 0.105 |
| Achromatopsia (no color) | #8C8C8C | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688BD4
#688BD4
oklch(64.2% 0.117 263.9)
- #AE8629
#AE8629
oklch(64.2% 0.117 84.2)
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 #688BD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.039
- Faded Blue #658CBB ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.049
- Cool Blue #4984B8 ΔE 0.058
- Perrywinkle #8F8CE7 ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.063
Use #688BD4 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.