#688FEC
Closest named color: Cornflower Blue (#6495ED). oklch(66.4% 0.145 265.5), rgb(104, 143, 236).
Aa
Black text reads best on this color (6.72:1).
About this color
#688FEC is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.145 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.016 away. Black text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.72:1 |
| White text | 3.12:1 |
Values
| HEX | #688FEC |
| RGB | rgb(104, 143, 236) |
| HSL | hsl(222, 78%, 67%) |
| OKLCH | oklch(66.4% 0.145 265.5) |
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 #688FEC | 3.12:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #688FEC | 6.72:1 | AA | Lc 46.0 | Large or bold text, headings |
| #688FEC text on white | 3.12:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #688FEC text on black | 6.72:1 | AA | Lc -43.7 | 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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ABC0F0
oklch(80.9% 0.072 266.3)
-
Step 400
400
#7E9FE8
oklch(70.8% 0.114 265.1)
-
Step 500
500 (this color)
#688FEC
oklch(66.4% 0.145 265.5)
-
Step 600
600
#466CCF
oklch(55.5% 0.159 265.7)
-
Step 700
700
#385AB3
oklch(49.1% 0.147 265.6)
-
Step 800
800
#2E4A91
oklch(42.7% 0.122 265.4)
-
Step 900
900
#293E74
oklch(37.6% 0.096 266)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#688FEC 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) | #6898F0 | 0.023 |
| Deuteranopia (no green cones) | #578CEA | 0.021 |
| Tritanopia (no blue cones) | #09A3B2 | 0.130 |
| Achromatopsia (no color) | #929292 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688FEC
#688FEC
oklch(66.4% 0.145 265.5)
- #B98C00
#B98C00
oklch(66.5% 0.136 85.7)
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 #688FEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.016
- Soft Blue #6488EA ΔE 0.019
- Chefchaouen Blue #4895EF ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.038
- Perrywinkle #8F8CE7 ΔE 0.049
- Lavender Blue #8B88F8 ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.058
- Cornflower #6A79F7 ΔE 0.060
Use #688FEC 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.