#668ACA
Closest named color: Faded Blue (#658CBB). oklch(63.4% 0.105 261.4), rgb(102, 138, 202).
Aa
Black text reads best on this color (6.05:1).
About this color
#668ACA is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.105 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.025 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.05:1 |
| White text | 3.46:1 |
Values
| HEX | #668ACA |
| RGB | rgb(102, 138, 202) |
| HSL | hsl(218, 49%, 60%) |
| OKLCH | oklch(63.4% 0.105 261.4) |
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 #668ACA | 3.46:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #668ACA | 6.05:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #668ACA text on white | 3.46:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #668ACA text on black | 6.05:1 | AA | Lc -39.6 | 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
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC2E3
oklch(81% 0.052 260.4)
-
Step 400
400
#84A1D4
oklch(70.6% 0.082 261.5)
-
Step 500
500 (this color)
#668ACA
oklch(63.4% 0.105 261.4)
-
Step 600
600
#4C72B6
oklch(55.6% 0.115 261.3)
-
Step 700
700
#3D5F9D
oklch(49% 0.107 261.5)
-
Step 800
800
#334E7F
oklch(42.7% 0.088 261.5)
-
Step 900
900
#2D4166
oklch(37.7% 0.069 262)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#668ACA 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) | #728FCD | 0.021 |
| Deuteranopia (no green cones) | #6685C9 | 0.014 |
| Tritanopia (no blue cones) | #3A98A1 | 0.094 |
| Achromatopsia (no color) | #8A8A8A | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668ACA
#668ACA
oklch(63.4% 0.105 261.4)
- #AA8337
#AA8337
oklch(63.3% 0.105 81.4)
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 #668ACA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.025
- Cool Blue #4984B8 ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.047
- Off Blue #5684AE ΔE 0.049
- Soft Blue #6488EA ΔE 0.050
- Steel Blue #4682B4 ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.055
Use #668ACA 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.