#669DB3
Closest named color: Greyblue (#77A1B5). oklch(66.6% 0.066 225.2), rgb(102, 157, 179).
Aa
Black text reads best on this color (7.03:1).
About this color
#669DB3 is a medium-light, muted teal or cyan. In OKLCH its lightness is 67%, its chroma 0.066 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.023 away. Black text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.03:1 |
| White text | 2.98:1 |
Values
| HEX | #669DB3 |
| RGB | rgb(102, 157, 179) |
| HSL | hsl(197, 34%, 55%) |
| OKLCH | oklch(66.6% 0.066 225.2) |
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 #669DB3 | 2.98:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #669DB3 | 7.03:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #669DB3 text on white | 2.98:1 | Fails | Lc 56.4 | Large or bold text, headings |
| #669DB3 text on black | 7.03:1 | AAA | Lc -45.4 | 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
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#ABC6D1
oklch(81% 0.033 224.3)
-
Step 400
400
#7EA8B9
oklch(70.7% 0.052 224.8)
-
Step 500
500 (this color)
#669DB3
oklch(66.6% 0.066 225.2)
-
Step 600
600
#407C93
oklch(55.5% 0.072 225.4)
-
Step 700
700
#31697E
oklch(49.2% 0.067 225.3)
-
Step 800
800
#2A5566
oklch(42.6% 0.055 226.1)
-
Step 900
900
#274753
oklch(37.9% 0.043 224.2)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#669DB3 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) | #919AB4 | 0.052 |
| Deuteranopia (no green cones) | #8592B3 | 0.046 |
| Tritanopia (no blue cones) | #45A4A4 | 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°).
- #669DB3
#669DB3
oklch(66.6% 0.066 225.2)
- #B78872
#B78872
oklch(66.7% 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 #669DB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.023
- Cadet Blue #5F9EA0 ΔE 0.032
- Bluegrey #85A3B2 ΔE 0.042
- Bluey Grey #89A0B0 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.045
- Cool Gray #8D99AE ΔE 0.046
- Faded Blue #658CBB ΔE 0.054
Use #669DB3 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.