#669CB3
Closest named color: Greyblue (#77A1B5). oklch(66.4% 0.066 226.7), rgb(102, 156, 179).
Aa
Black text reads best on this color (6.97:1).
About this color
#669CB3 is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.066 and its hue 227°. 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 6.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.97:1 |
| White text | 3.01:1 |
Values
| HEX | #669CB3 |
| RGB | rgb(102, 156, 179) |
| HSL | hsl(198, 34%, 55%) |
| OKLCH | oklch(66.4% 0.066 226.7) |
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 #669CB3 | 3.01:1 | AA large text | Lc -62.1 | Content text, not long reading |
| Black text on #669CB3 | 6.97:1 | AA | Lc 47.3 | Large or bold text, headings |
| #669CB3 text on white | 3.01:1 | AA large text | Lc 56.8 | Large or bold text, headings |
| #669CB3 text on black | 6.97:1 | AA | Lc -45.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#ACC5D1
oklch(80.9% 0.032 228.3)
-
Step 400
400
#7EA8BA
oklch(70.7% 0.052 226.2)
-
Step 500
500 (this color)
#669CB3
oklch(66.4% 0.066 226.7)
-
Step 600
600
#417C94
oklch(55.6% 0.072 226.8)
-
Step 700
700
#32687E
oklch(49% 0.067 227.2)
-
Step 800
800
#2A5567
oklch(42.7% 0.056 227.6)
-
Step 900
900
#274653
oklch(37.6% 0.043 226.9)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#669CB3 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) | #909AB4 | 0.051 |
| Deuteranopia (no green cones) | #8491B3 | 0.045 |
| Tritanopia (no blue cones) | #46A3A3 | 0.046 |
| Achromatopsia (no color) | #959595 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CB3
#669CB3
oklch(66.4% 0.066 226.7)
- #B68771
#B68771
oklch(66.3% 0.066 46.2)
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 #669CB3, 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 0.033
- Silver Lake Blue #778DA9 ΔE 0.042
- Blue Grey #758DA3 ΔE 0.043
- Bluegrey #85A3B2 ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.044
- Cool Gray #8D99AE ΔE 0.046
- Faded Blue #658CBB ΔE 0.051
Use #669CB3 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.