#668FCD
Closest named color: Faded Blue (#658CBB). oklch(64.6% 0.104 258.4), rgb(102, 143, 205).
Aa
Black text reads best on this color (6.37:1).
About this color
#668FCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.104 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.027 away. Black text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #668FCD |
| RGB | rgb(102, 143, 205) |
| HSL | hsl(216, 51%, 60%) |
| OKLCH | oklch(64.6% 0.104 258.4) |
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 #668FCD | 3.29:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #668FCD | 6.37:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #668FCD text on white | 3.29:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #668FCD text on black | 6.37:1 | AA | Lc -41.5 | 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
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ADC2E2
oklch(80.9% 0.051 258.7)
-
Step 400
400
#81A2D4
oklch(70.7% 0.082 258.5)
-
Step 500
500 (this color)
#668FCD
oklch(64.6% 0.104 258.4)
-
Step 600
600
#4873B5
oklch(55.5% 0.114 258.7)
-
Step 700
700
#39619C
oklch(49.2% 0.105 258)
-
Step 800
800
#304F7E
oklch(42.7% 0.087 258.5)
-
Step 900
900
#2A4265
oklch(37.7% 0.067 257.7)
-
Step 950
950
#19273B
oklch(27% 0.042 257.3)
#668FCD 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) | #7793D0 | 0.025 |
| Deuteranopia (no green cones) | #6B89CC | 0.016 |
| Tritanopia (no blue cones) | #369DA5 | 0.093 |
| Achromatopsia (no color) | #8E8E8E | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668FCD
#668FCD
oklch(64.6% 0.104 258.4)
- #B0863D
#B0863D
oklch(64.6% 0.104 78.9)
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 #668FCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.047
- Soft Blue #6488EA ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.054
- Cool Blue #4984B8 ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.056
Use #668FCD 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.