#668ACD
Closest named color: Faded Blue (#658CBB). oklch(63.5% 0.109 262.2), rgb(102, 138, 205).
Aa
Black text reads best on this color (6.08:1).
About this color
#668ACD is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.109 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.030 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.08:1 |
| White text | 3.45:1 |
Values
| HEX | #668ACD |
| RGB | rgb(102, 138, 205) |
| HSL | hsl(219, 51%, 60%) |
| OKLCH | oklch(63.5% 0.109 262.2) |
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 #668ACD | 3.45:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #668ACD | 6.08:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #668ACD text on white | 3.45:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #668ACD text on black | 6.08:1 | AA | Lc -39.7 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC1E4
oklch(80.8% 0.054 262.6)
-
Step 400
400
#84A1D6
oklch(70.7% 0.085 262.2)
-
Step 500
500 (this color)
#668ACD
oklch(63.5% 0.109 262.2)
-
Step 600
600
#4C72B8
oklch(55.7% 0.118 261.7)
-
Step 700
700
#3D5F9F
oklch(49.1% 0.11 262)
-
Step 800
800
#334E81
oklch(42.8% 0.091 262.1)
-
Step 900
900
#2C4167
oklch(37.7% 0.071 261.6)
-
Step 950
950
#1A263D
oklch(27% 0.046 262.7)
#668ACD 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) | #708FD0 | 0.019 |
| Deuteranopia (no green cones) | #6486CC | 0.011 |
| Tritanopia (no blue cones) | #3798A2 | 0.097 |
| Achromatopsia (no color) | #8A8A8A | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668ACD
#668ACD
oklch(63.5% 0.109 262.2)
- #AB8432
#AB8432
oklch(63.6% 0.109 82.8)
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 #668ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.044
- Soft Blue #6488EA ΔE 0.046
- Cool Blue #4984B8 ΔE 0.049
- Cornflower Blue #6495ED ΔE 0.051
- Dusty Blue #5A86AD ΔE 0.052
- Off Blue #5684AE ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.056
Use #668ACD 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.