#688EDF
Closest named color: Cornflower Blue (#6495ED). oklch(65.4% 0.129 264.1), rgb(104, 142, 223).
Aa
Black text reads best on this color (6.52:1).
About this color
#688EDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.129 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.025 away. Black text reads best on it, at 6.52:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.52:1 |
| White text | 3.21:1 |
Values
| HEX | #688EDF |
| RGB | rgb(104, 142, 223) |
| HSL | hsl(221, 65%, 64%) |
| OKLCH | oklch(65.4% 0.129 264.1) |
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 #688EDF | 3.21:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #688EDF | 6.52:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #688EDF text on white | 3.21:1 | AA large text | Lc 59.3 | Large or bold text, headings |
| #688EDF text on black | 6.52:1 | AA | Lc -42.4 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#81A0E0
oklch(70.8% 0.1 264.1)
-
Step 500
500 (this color)
#688EDF
oklch(65.4% 0.129 264.1)
-
Step 600
600
#486FC5
oklch(55.6% 0.141 264)
-
Step 700
700
#3A5CAA
oklch(49% 0.131 264.4)
-
Step 800
800
#304C89
oklch(42.7% 0.107 263.9)
-
Step 900
900
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#688EDF 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) | #6E95E2 | 0.021 |
| Deuteranopia (no green cones) | #5F8ADD | 0.016 |
| Tritanopia (no blue cones) | #28A0AC | 0.116 |
| Achromatopsia (no color) | #8F8F8F | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688EDF
#688EDF
oklch(65.4% 0.129 264.1)
- #B58916
#B58916
oklch(65.5% 0.129 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 #688EDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.025
- Soft Blue #6488EA ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.037
- Perrywinkle #8F8CE7 ΔE 0.052
- Faded Blue #658CBB ΔE 0.055
- Lavender Blue #8B88F8 ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.068
Use #688EDF 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.