#669EA6
Closest named color: Cadet Blue (#5F9EA0). oklch(66.3% 0.06 207.2), rgb(102, 158, 166).
Aa
Black text reads best on this color (7.00:1).
About this color
#669EA6 is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.060 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.012 away. Black text reads best on it, at 7.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.00:1 |
| White text | 2.99:1 |
Values
| HEX | #669EA6 |
| RGB | rgb(102, 158, 166) |
| HSL | hsl(188, 26%, 53%) |
| OKLCH | oklch(66.3% 0.06 207.2) |
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 #669EA6 | 2.99:1 | Fails | Lc -61.9 | Content text, not long reading |
| Black text on #669EA6 | 7.00:1 | AAA | Lc 47.5 | Large or bold text, headings |
| #669EA6 text on white | 2.99:1 | Fails | Lc 56.6 | Large or bold text, headings |
| #669EA6 text on black | 7.00:1 | AAA | Lc -45.2 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ACC6CA
oklch(80.8% 0.029 207.8)
-
Step 400
400
#7FA9B0
oklch(70.7% 0.046 208.8)
-
Step 500
500 (this color)
#669EA6
oklch(66.3% 0.06 207.2)
-
Step 600
600
#407E87
oklch(55.5% 0.065 207.8)
-
Step 700
700
#326A72
oklch(49% 0.06 207.7)
-
Step 800
800
#2A575D
oklch(42.7% 0.05 206.8)
-
Step 900
900
#27484C
oklch(37.8% 0.039 205.6)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#669EA6 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) | #959AA7 | 0.058 |
| Deuteranopia (no green cones) | #8A91A6 | 0.054 |
| Tritanopia (no blue cones) | #4CA3A0 | 0.030 |
| Achromatopsia (no color) | #959595 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669EA6
#669EA6
oklch(66.3% 0.06 207.2)
- #B5867F
#B5867F
oklch(66.4% 0.059 28.3)
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 #669EA6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.012
- Greyblue #77A1B5 ΔE 0.031
- Dull Teal #5F9E8F ΔE 0.037
- Grey Teal #5E9B8A ΔE 0.043
- Bluegrey #85A3B2 ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.049
- Cool Gray #8D99AE ΔE 0.052
Use #669EA6 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.