#688DFB
Closest named color: Soft Blue (#6488EA). oklch(66.8% 0.168 267.7), rgb(104, 141, 251).
Aa
Black text reads best on this color (6.79:1).
About this color
#688DFB is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.168 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.028 away. Black text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.79:1 |
| White text | 3.09:1 |
Values
| HEX | #688DFB |
| RGB | rgb(104, 141, 251) |
| HSL | hsl(225, 95%, 70%) |
| OKLCH | oklch(66.8% 0.168 267.7) |
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 #688DFB | 3.09:1 | AA large text | Lc -63.0 | Content text, not long reading |
| Black text on #688DFB | 6.79:1 | AA | Lc 46.4 | Large or bold text, headings |
| #688DFB text on white | 3.09:1 | AA large text | Lc 57.6 | Large or bold text, headings |
| #688DFB text on black | 6.79:1 | AA | Lc -44.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9BFF7
oklch(80.8% 0.083 267.9)
-
Step 400
400
#7D9CF3
oklch(70.6% 0.132 268.1)
-
Step 500
500 (this color)
#688DFB
oklch(66.8% 0.168 267.7)
-
Step 600
600
#4568DC
oklch(55.6% 0.182 267.5)
-
Step 700
700
#3755BF
oklch(49% 0.17 267.7)
-
Step 800
800
#2E479B
oklch(42.8% 0.14 267.6)
-
Step 900
900
#283C7B
oklch(37.6% 0.11 267.6)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#688DFB 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) | #5B9AFF | 0.033 |
| Deuteranopia (no green cones) | #458CF9 | 0.034 |
| Tritanopia (no blue cones) | #00A6B8 | 0.147 |
| Achromatopsia (no color) | #929292 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688DFB
#688DFB
oklch(66.8% 0.168 267.7)
- #B88E00
#B88E00
oklch(66.8% 0.137 87.5)
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 #688DFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.028
- Cornflower Blue #6495ED ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.041
- Lavender Blue #8B88F8 ΔE 0.044
- Cornflower #6A79F7 ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.053
- Periwinkle #8E82FE ΔE 0.053
Use #688DFB 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.