#668FD9
Closest named color: Cornflower Blue (#6495ED). oklch(65.2% 0.12 261.6), rgb(102, 143, 217).
Aa
Black text reads best on this color (6.49:1).
About this color
#668FD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.120 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.031 away. Black text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.49:1 |
| White text | 3.23:1 |
Values
| HEX | #668FD9 |
| RGB | rgb(102, 143, 217) |
| HSL | hsl(219, 60%, 63%) |
| OKLCH | oklch(65.2% 0.12 261.6) |
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 #668FD9 | 3.23:1 | AA large text | Lc -64.9 | Content text, not long reading |
| Black text on #668FD9 | 6.49:1 | AA | Lc 44.6 | Non-text elements, placeholder text |
| #668FD9 text on white | 3.23:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #668FD9 text on black | 6.49:1 | AA | Lc -42.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ACC2E7
oklch(81% 0.058 260.8)
-
Step 400
400
#80A1DC
oklch(70.7% 0.094 261.7)
-
Step 500
500 (this color)
#668FD9
oklch(65.2% 0.12 261.6)
-
Step 600
600
#4771BF
oklch(55.6% 0.13 261.7)
-
Step 700
700
#385EA5
oklch(49% 0.122 261.7)
-
Step 800
800
#2F4D86
oklch(42.7% 0.101 262)
-
Step 900
900
#29416B
oklch(37.7% 0.078 260.9)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#668FD9 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) | #7295DC | 0.023 |
| Deuteranopia (no green cones) | #648AD7 | 0.014 |
| Tritanopia (no blue cones) | #289FAA | 0.107 |
| Achromatopsia (no color) | #8F8F8F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668FD9
#668FD9
oklch(65.2% 0.12 261.6)
- #B58728
#B58728
oklch(65.2% 0.121 81.1)
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 #668FD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.031
- Soft Blue #6488EA ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.040
- Faded Blue #658CBB ΔE 0.045
- Perrywinkle #8F8CE7 ΔE 0.058
- Cool Blue #4984B8 ΔE 0.066
- Dusty Blue #5A86AD ΔE 0.070
Use #668FD9 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.