#668DD1
Closest named color: Faded Blue (#658CBB). oklch(64.4% 0.112 261), rgb(102, 141, 209).
Aa
Black text reads best on this color (6.29:1).
About this color
#668DD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.112 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.033 away. Black text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.29:1 |
| White text | 3.33:1 |
Values
| HEX | #668DD1 |
| RGB | rgb(102, 141, 209) |
| HSL | hsl(218, 54%, 61%) |
| OKLCH | oklch(64.4% 0.112 261) |
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 #668DD1 | 3.33:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #668DD1 | 6.29:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #668DD1 text on white | 3.33:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #668DD1 text on black | 6.29:1 | AA | Lc -41.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ADC2E5
oklch(81% 0.055 260.6)
-
Step 400
400
#82A1D7
oklch(70.6% 0.087 261.3)
-
Step 500
500 (this color)
#668DD1
oklch(64.4% 0.112 261)
-
Step 600
600
#4972BA
oklch(55.6% 0.122 260.9)
-
Step 700
700
#3A5FA0
oklch(49% 0.113 260.9)
-
Step 800
800
#314E82
oklch(42.8% 0.093 261.3)
-
Step 900
900
#2B4168
oklch(37.7% 0.073 261.2)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#668DD1 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) | #7392D4 | 0.022 |
| Deuteranopia (no green cones) | #6688D0 | 0.013 |
| Tritanopia (no blue cones) | #329CA5 | 0.101 |
| Achromatopsia (no color) | #8D8D8D | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668DD1
#668DD1
oklch(64.4% 0.112 261)
- #B08532
#B08532
oklch(64.3% 0.112 80.6)
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 #668DD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.041
- Soft Blue #6488EA ΔE 0.043
- Cornflower Blue #6495ED ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.050
- Cool Blue #4984B8 ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.058
- Off Blue #5684AE ΔE 0.060
Use #668DD1 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.