#688EE9
Closest named color: Soft Blue (#6488EA). oklch(66% 0.142 265.6), rgb(104, 142, 233).
Aa
Black text reads best on this color (6.63:1).
About this color
#688EE9 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.142 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.017 away. Black text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.63:1 |
| White text | 3.16:1 |
Values
| HEX | #688EE9 |
| RGB | rgb(104, 142, 233) |
| HSL | hsl(222, 75%, 66%) |
| OKLCH | oklch(66% 0.142 265.6) |
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 #688EE9 | 3.16:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #688EE9 | 6.63:1 | AA | Lc 45.5 | Large or bold text, headings |
| #688EE9 text on white | 3.16:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #688EE9 text on black | 6.63:1 | AA | Lc -43.1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ABC0EF
oklch(80.8% 0.071 266)
-
Step 400
400
#7F9FE6
oklch(70.7% 0.111 265.2)
-
Step 500
500 (this color)
#688EE9
oklch(66% 0.142 265.6)
-
Step 600
600
#476DCD
oklch(55.7% 0.155 265.4)
-
Step 700
700
#395AB1
oklch(49% 0.144 265.7)
-
Step 800
800
#2F4A90
oklch(42.7% 0.12 265.7)
-
Step 900
900
#2A3F73
oklch(37.9% 0.093 265.6)
-
Step 950
950
#182543
oklch(27% 0.059 265)
#688EE9 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) | #6897ED | 0.024 |
| Deuteranopia (no green cones) | #588BE7 | 0.020 |
| Tritanopia (no blue cones) | #15A2B0 | 0.128 |
| Achromatopsia (no color) | #919191 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688EE9
#688EE9
oklch(66% 0.142 265.6)
- #B78A00
#B78A00
oklch(65.9% 0.135 85.3)
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 #688EE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.017
- Cornflower Blue #6495ED ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.036
- Perrywinkle #8F8CE7 ΔE 0.049
- Lavender Blue #8B88F8 ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.060
- Cornflower #6A79F7 ΔE 0.060
Use #688EE9 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.