#688BD8
Closest named color: Soft Blue (#6488EA). oklch(64.4% 0.123 264.7), rgb(104, 139, 216).
Aa
Black text reads best on this color (6.27:1).
About this color
#688BD8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.123 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.030 away. Black text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #688BD8 |
| RGB | rgb(104, 139, 216) |
| HSL | hsl(221, 59%, 63%) |
| OKLCH | oklch(64.4% 0.123 264.7) |
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 #688BD8 | 3.34:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #688BD8 | 6.27:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #688BD8 text on white | 3.34:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #688BD8 text on black | 6.27:1 | AA | Lc -40.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F0
oklch(88.4% 0.034 265.2)
-
Step 300
300
#AEC1E8
oklch(81% 0.059 264.6)
-
Step 400
400
#83A0DD
oklch(70.8% 0.096 264.5)
-
Step 500
500 (this color)
#688BD8
oklch(64.4% 0.123 264.7)
-
Step 600
600
#4C6FC1
oklch(55.6% 0.134 265)
-
Step 700
700
#3D5DA6
oklch(49.1% 0.123 264.5)
-
Step 800
800
#324C87
oklch(42.7% 0.103 264.5)
-
Step 900
900
#2C406C
oklch(37.7% 0.08 264.4)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#688BD8 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) | #6D92DB | 0.020 |
| Deuteranopia (no green cones) | #6088D6 | 0.013 |
| Tritanopia (no blue cones) | #319CA7 | 0.111 |
| Achromatopsia (no color) | #8C8C8C | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688BD8
#688BD8
oklch(64.4% 0.123 264.7)
- #B0861F
#B0861F
oklch(64.4% 0.123 84.3)
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 #688BD8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.037
- Chefchaouen Blue #4895EF ΔE 0.045
- Faded Blue #658CBB ΔE 0.046
- Perrywinkle #8F8CE7 ΔE 0.057
- Cool Blue #4984B8 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.068
Use #688BD8 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.