#669EA8
Closest named color: Cadet Blue (#5F9EA0). oklch(66.4% 0.061 210), rgb(102, 158, 168).
Aa
Black text reads best on this color (7.02:1).
About this color
#669EA8 is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.061 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.015 away. Black text reads best on it, at 7.02:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.02:1 |
| White text | 2.99:1 |
Values
| HEX | #669EA8 |
| RGB | rgb(102, 158, 168) |
| HSL | hsl(189, 27%, 53%) |
| OKLCH | oklch(66.4% 0.061 210) |
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 #669EA8 | 2.99:1 | Fails | Lc -61.8 | Content text, not long reading |
| Black text on #669EA8 | 7.02:1 | AAA | Lc 47.6 | Large or bold text, headings |
| #669EA8 text on white | 2.99:1 | Fails | Lc 56.5 | Large or bold text, headings |
| #669EA8 text on black | 7.02:1 | AAA | Lc -45.3 | 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
#ACC6CB
oklch(80.9% 0.029 210.5)
-
Step 400
400
#7EA9B1
oklch(70.6% 0.048 210.3)
-
Step 500
500 (this color)
#669EA8
oklch(66.4% 0.061 210)
-
Step 600
600
#407E89
oklch(55.6% 0.066 210.4)
-
Step 700
700
#316A74
oklch(49% 0.061 210.5)
-
Step 800
800
#2A575E
oklch(42.8% 0.051 208.7)
-
Step 900
900
#27474D
oklch(37.6% 0.039 210.9)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#669EA8 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) | #959AA9 | 0.058 |
| Deuteranopia (no green cones) | #8A92A8 | 0.052 |
| Tritanopia (no blue cones) | #4BA3A1 | 0.032 |
| Achromatopsia (no color) | #959595 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669EA8
#669EA8
oklch(66.4% 0.061 210)
- #B6867E
#B6867E
oklch(66.5% 0.061 29.5)
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 #669EA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.015
- Greyblue #77A1B5 ΔE 0.029
- Dull Teal #5F9E8F ΔE 0.040
- Bluegrey #85A3B2 ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.045
- Grey Teal #5E9B8A ΔE 0.046
- Blue Grey #758DA3 ΔE 0.048
- Cool Gray #8D99AE ΔE 0.050
Use #669EA8 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.