#688FDF
Closest named color: Cornflower Blue (#6495ED). oklch(65.7% 0.128 263.6), rgb(104, 143, 223).
Aa
Black text reads best on this color (6.58:1).
About this color
#688FDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.128 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.023 away. Black text reads best on it, at 6.58:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.58:1 |
| White text | 3.18:1 |
Values
| HEX | #688FDF |
| RGB | rgb(104, 143, 223) |
| HSL | hsl(220, 65%, 64%) |
| OKLCH | oklch(65.7% 0.128 263.6) |
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 #688FDF | 3.18:1 | AA large text | Lc -64.3 | Content text, not long reading |
| Black text on #688FDF | 6.58:1 | AA | Lc 45.1 | Large or bold text, headings |
| #688FDF text on white | 3.18:1 | AA large text | Lc 58.9 | Large or bold text, headings |
| #688FDF text on black | 6.58:1 | AA | Lc -42.8 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#80A0DF
oklch(70.7% 0.1 263.4)
-
Step 500
500 (this color)
#688FDF
oklch(65.7% 0.128 263.6)
-
Step 600
600
#486FC4
oklch(55.5% 0.139 263.9)
-
Step 700
700
#395DA9
oklch(49.1% 0.129 263.4)
-
Step 800
800
#2F4C89
oklch(42.6% 0.107 263.4)
-
Step 900
900
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#688FDF 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) | #6F96E2 | 0.021 |
| Deuteranopia (no green cones) | #618BDD | 0.014 |
| Tritanopia (no blue cones) | #28A0AC | 0.114 |
| Achromatopsia (no color) | #909090 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688FDF
#688FDF
oklch(65.7% 0.128 263.6)
- #B6891B
#B6891B
oklch(65.6% 0.128 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 #688FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.023
- Soft Blue #6488EA ΔE 0.028
- Dark Sky Blue #448EE4 ΔE 0.035
- Chefchaouen Blue #4895EF ΔE 0.036
- Perrywinkle #8F8CE7 ΔE 0.052
- Faded Blue #658CBB ΔE 0.054
- Lavender Blue #8B88F8 ΔE 0.063
- Dodger Blue #1E90FF ΔE 0.069
Use #688FDF 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.