#688FDD
Closest named color: Cornflower Blue (#6495ED). oklch(65.5% 0.125 263.2), rgb(104, 143, 221).
Aa
Black text reads best on this color (6.56:1).
About this color
#688FDD is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.125 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.026 away. Black text reads best on it, at 6.56:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.56:1 |
| White text | 3.20:1 |
Values
| HEX | #688FDD |
| RGB | rgb(104, 143, 221) |
| HSL | hsl(220, 63%, 64%) |
| OKLCH | oklch(65.5% 0.125 263.2) |
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 #688FDD | 3.20:1 | AA large text | Lc -64.5 | Content text, not long reading |
| Black text on #688FDD | 6.56:1 | AA | Lc 45.0 | Large or bold text, headings |
| #688FDD text on white | 3.20:1 | AA large text | Lc 59.1 | Large or bold text, headings |
| #688FDD text on black | 6.56:1 | AA | Lc -42.7 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#81A0DE
oklch(70.7% 0.098 263.6)
-
Step 500
500 (this color)
#688FDD
oklch(65.5% 0.125 263.2)
-
Step 600
600
#4870C2
oklch(55.6% 0.135 263.1)
-
Step 700
700
#395DA8
oklch(49.1% 0.127 263.2)
-
Step 800
800
#304C88
oklch(42.6% 0.105 263.7)
-
Step 900
900
#2A406D
oklch(37.7% 0.082 263.3)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#688FDD 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) | #7096E0 | 0.022 |
| Deuteranopia (no green cones) | #628BDB | 0.014 |
| Tritanopia (no blue cones) | #2AA0AC | 0.112 |
| Achromatopsia (no color) | #909090 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688FDD
#688FDD
oklch(65.5% 0.125 263.2)
- #B58921
#B58921
oklch(65.6% 0.125 83.6)
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 #688FDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.026
- Soft Blue #6488EA ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.038
- Faded Blue #658CBB ΔE 0.051
- Perrywinkle #8F8CE7 ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.071
Use #688FDD 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.