#669CB5
Closest named color: Greyblue (#77A1B5). oklch(66.4% 0.068 228.9), rgb(102, 156, 181).
Aa
Black text reads best on this color (6.98:1).
About this color
#669CB5 is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.068 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.025 away. Black text reads best on it, at 6.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #669CB5 |
| RGB | rgb(102, 156, 181) |
| HSL | hsl(199, 35%, 55%) |
| OKLCH | oklch(66.4% 0.068 228.9) |
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 #669CB5 | 3.00:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #669CB5 | 6.98:1 | AA | Lc 47.4 | Large or bold text, headings |
| #669CB5 text on white | 3.00:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #669CB5 text on black | 6.98:1 | AA | Lc -45.1 | Large or bold text, headings |
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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ABC5D2
oklch(80.8% 0.034 229.4)
-
Step 400
400
#7EA8BB
oklch(70.8% 0.053 227.5)
-
Step 500
500 (this color)
#669CB5
oklch(66.4% 0.068 228.9)
-
Step 600
600
#407C96
oklch(55.7% 0.074 228.5)
-
Step 700
700
#326880
oklch(49.1% 0.069 229.4)
-
Step 800
800
#2A5568
oklch(42.7% 0.057 229)
-
Step 900
900
#274654
oklch(37.6% 0.044 228.8)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#669CB5 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) | #8F9AB6 | 0.050 |
| Deuteranopia (no green cones) | #8491B5 | 0.045 |
| Tritanopia (no blue cones) | #45A3A4 | 0.048 |
| Achromatopsia (no color) | #959595 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CB5
#669CB5
oklch(66.4% 0.068 228.9)
- #B7876F
#B7876F
oklch(66.4% 0.069 47.7)
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 #669CB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.025
- Cadet Blue #5F9EA0 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.044
- Bluegrey #85A3B2 ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.045
- Cool Gray #8D99AE ΔE 0.046
- Faded Blue #658CBB ΔE 0.050
Use #669CB5 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.