#688EE3
Closest named color: Cornflower Blue (#6495ED). oklch(65.7% 0.134 264.7), rgb(104, 142, 227).
Aa
Black text reads best on this color (6.56:1).
About this color
#688EE3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.134 and its hue 265°. 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 6.56:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.56:1 |
| White text | 3.19:1 |
Values
| HEX | #688EE3 |
| RGB | rgb(104, 142, 227) |
| HSL | hsl(221, 69%, 65%) |
| OKLCH | oklch(65.7% 0.134 264.7) |
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 #688EE3 | 3.19:1 | AA large text | Lc -64.4 | Content text, not long reading |
| Black text on #688EE3 | 6.56:1 | AA | Lc 45.0 | Large or bold text, headings |
| #688EE3 text on white | 3.19:1 | AA large text | Lc 59.0 | Large or bold text, headings |
| #688EE3 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EC
oklch(81% 0.065 264.5)
-
Step 400
400
#809FE3
oklch(70.6% 0.106 265)
-
Step 500
500 (this color)
#688EE3
oklch(65.7% 0.134 264.7)
-
Step 600
600
#486EC8
oklch(55.6% 0.146 264.8)
-
Step 700
700
#395CAD
oklch(49.2% 0.136 264.4)
-
Step 800
800
#304B8C
oklch(42.7% 0.113 265)
-
Step 900
900
#2A3F70
oklch(37.6% 0.088 265)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#688EE3 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) | #6B96E6 | 0.022 |
| Deuteranopia (no green cones) | #5D8BE1 | 0.016 |
| Tritanopia (no blue cones) | #22A1AE | 0.121 |
| Achromatopsia (no color) | #909090 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688EE3
#688EE3
oklch(65.7% 0.134 264.7)
- #B78902
#B78902
oklch(65.7% 0.134 84.6)
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 #688EE3, 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 0.022
- Chefchaouen Blue #4895EF ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.034
- Perrywinkle #8F8CE7 ΔE 0.050
- Lavender Blue #8B88F8 ΔE 0.058
- Faded Blue #658CBB ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.065
Use #688EE3 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.