#669FBF
Closest named color: Greyblue (#77A1B5). oklch(67.5% 0.076 234.1), rgb(102, 159, 191).
Aa
Black text reads best on this color (7.27:1).
About this color
#669FBF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.076 and its hue 234°. 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 7.27:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.27:1 |
| White text | 2.88:1 |
Values
| HEX | #669FBF |
| RGB | rgb(102, 159, 191) |
| HSL | hsl(202, 41%, 57%) |
| OKLCH | oklch(67.5% 0.076 234.1) |
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 #669FBF | 2.88:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #669FBF | 7.27:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #669FBF text on white | 2.88:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #669FBF text on black | 7.27:1 | AAA | Lc -46.8 | 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 400.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A3C6DB
oklch(80.8% 0.048 234.5)
-
Step 400
400 (this color)
#669FBF
oklch(67.5% 0.076 234.1)
-
Step 500
500
#4593BB
oklch(63.1% 0.097 233.6)
-
Step 600
600
#1F7DA8
oklch(55.7% 0.106 233.9)
-
Step 700
700
#0E6990
oklch(49.1% 0.099 234.1)
-
Step 800
800
#125675
oklch(42.8% 0.082 233.9)
-
Step 900
900
#19475E
oklch(37.8% 0.063 233.8)
-
Step 950
950
#102A37
oklch(27.1% 0.04 232.6)
#669FBF 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) | #909DC1 | 0.050 |
| Deuteranopia (no green cones) | #8394BF | 0.043 |
| Tritanopia (no blue cones) | #3DA8A9 | 0.059 |
| Achromatopsia (no color) | #989898 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FBF
#669FBF
oklch(67.5% 0.076 234.1)
- #BC8A6A
#BC8A6A
oklch(67.4% 0.076 53.7)
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 #669FBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.048
- Cool Gray #8D99AE ΔE 0.049
- Silver Lake Blue #778DA9 ΔE 0.052
- Faded Blue #658CBB ΔE 0.053
- Blue Grey #758DA3 ΔE 0.056
Use #669FBF 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.