#688FF4
Closest named color: Cornflower Blue (#6495ED). oklch(66.8% 0.156 266.4), rgb(104, 143, 244).
Aa
Black text reads best on this color (6.82:1).
About this color
#688FF4 is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.156 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.021 away. Black text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #688FF4 |
| RGB | rgb(104, 143, 244) |
| HSL | hsl(223, 86%, 68%) |
| OKLCH | oklch(66.8% 0.156 266.4) |
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 #688FF4 | 3.07:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #688FF4 | 6.82:1 | AA | Lc 46.6 | Large or bold text, headings |
| #688FF4 text on white | 3.07:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #688FF4 text on black | 6.82:1 | AA | Lc -44.3 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F3
oklch(80.9% 0.076 266.5)
-
Step 400
400
#7D9EED
oklch(70.7% 0.122 266.1)
-
Step 500
500 (this color)
#688FF4
oklch(66.8% 0.156 266.4)
-
Step 600
600
#456AD5
oklch(55.5% 0.17 266.5)
-
Step 700
700
#3758B9
oklch(49.1% 0.158 266.4)
-
Step 800
800
#2D4996
oklch(42.8% 0.131 266)
-
Step 900
900
#283E77
oklch(37.8% 0.101 265.9)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#688FF4 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) | #639AF8 | 0.028 |
| Deuteranopia (no green cones) | #508DF2 | 0.026 |
| Tritanopia (no blue cones) | #00A5B6 | 0.137 |
| Achromatopsia (no color) | #939393 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688FF4
#688FF4
oklch(66.8% 0.156 266.4)
- #B98D00
#B98D00
oklch(66.7% 0.136 86.3)
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 #688FF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.021
- Soft Blue #6488EA ΔE 0.023
- Chefchaouen Blue #4895EF ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.044
- Lavender Blue #8B88F8 ΔE 0.046
- Perrywinkle #8F8CE7 ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.055
- Cornflower #6A79F7 ΔE 0.056
Use #688FF4 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.