#668DCE
Closest named color: Faded Blue (#658CBB). oklch(64.2% 0.107 260.2), rgb(102, 141, 206).
Aa
Black text reads best on this color (6.26:1).
About this color
#668DCE is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.107 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.029 away. Black text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #668DCE |
| RGB | rgb(102, 141, 206) |
| HSL | hsl(218, 51%, 60%) |
| OKLCH | oklch(64.2% 0.107 260.2) |
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 #668DCE | 3.35:1 | AA large text | Lc -66.3 | Content text, not long reading |
| Black text on #668DCE | 6.26:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #668DCE text on white | 3.35:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #668DCE text on black | 6.26:1 | AA | Lc -40.9 | 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E3
oklch(80.9% 0.052 259.4)
-
Step 400
400
#82A2D5
oklch(70.8% 0.083 259.6)
-
Step 500
500 (this color)
#668DCE
oklch(64.2% 0.107 260.2)
-
Step 600
600
#4A72B7
oklch(55.5% 0.117 260.7)
-
Step 700
700
#3B609E
oklch(49.2% 0.109 260.2)
-
Step 800
800
#314E80
oklch(42.6% 0.091 260.7)
-
Step 900
900
#2B4167
oklch(37.6% 0.071 260.8)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#668DCE 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) | #7492D1 | 0.023 |
| Deuteranopia (no green cones) | #6888CD | 0.013 |
| Tritanopia (no blue cones) | #359BA4 | 0.096 |
| Achromatopsia (no color) | #8C8C8C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668DCE
#668DCE
oklch(64.2% 0.107 260.2)
- #AF8537
#AF8537
oklch(64.3% 0.108 80.1)
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 #668DCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.047
- Soft Blue #6488EA ΔE 0.047
- Cool Blue #4984B8 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.054
- Off Blue #5684AE ΔE 0.056
Use #668DCE 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.