#688AFB
Closest named color: Soft Blue (#6488EA). oklch(66.2% 0.172 268.8), rgb(104, 138, 251).
Aa
Black text reads best on this color (6.61:1).
About this color
#688AFB is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.172 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.026 away. Black text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.61:1 |
| White text | 3.17:1 |
Values
| HEX | #688AFB |
| RGB | rgb(104, 138, 251) |
| HSL | hsl(226, 95%, 70%) |
| OKLCH | oklch(66.2% 0.172 268.8) |
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 #688AFB | 3.17:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #688AFB | 6.61:1 | AA | Lc 45.4 | Large or bold text, headings |
| #688AFB text on white | 3.17:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #688AFB text on black | 6.61:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#AABFF8
oklch(80.9% 0.084 268.8)
-
Step 400
400
#7E9CF4
oklch(70.8% 0.134 268.6)
-
Step 500
500 (this color)
#688AFB
oklch(66.2% 0.172 268.8)
-
Step 600
600
#4866DF
oklch(55.6% 0.187 269)
-
Step 700
700
#3A54C1
oklch(49.1% 0.173 268.9)
-
Step 800
800
#2F469C
oklch(42.7% 0.143 268.4)
-
Step 900
900
#293C7C
oklch(37.8% 0.111 268.3)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#688AFB 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) | #5597FF | 0.035 |
| Deuteranopia (no green cones) | #3F8AF9 | 0.039 |
| Tritanopia (no blue cones) | #00A3B6 | 0.150 |
| Achromatopsia (no color) | #909090 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688AFB
#688AFB
oklch(66.2% 0.172 268.8)
- #B58D00
#B58D00
oklch(66.3% 0.135 88.4)
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 #688AFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.026
- Cornflower Blue #6495ED ΔE 0.038
- Cornflower #6A79F7 ΔE 0.041
- Lavender Blue #8B88F8 ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.045
- Periwinkle #8E82FE ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.053
Use #688AFB 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.