#0665A9
Closest named color: Mid Blue (#276AB3). oklch(49.6% 0.133 248.5), rgb(6, 101, 169).
Aa
White text reads best on this color (6.10:1).
About this color
#0665A9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.133 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.027 away. White text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #0665A9 |
| RGB | rgb(6, 101, 169) |
| HSL | hsl(205, 93%, 34%) |
| OKLCH | oklch(49.6% 0.133 248.5) |
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 #0665A9 | 6.10:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #0665A9 | 3.44:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #0665A9 text on white | 6.10:1 | AA | Lc 79.9 | Fine for body text |
| #0665A9 text on black | 3.44:1 | AA large text | Lc -22.0 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A1C5E9
oklch(81% 0.064 248.6)
-
Step 400
400
#6CA6DE
oklch(70.8% 0.103 248.6)
-
Step 500
500
#408ED5
oklch(63.1% 0.132 248.9)
-
Step 600
600
#1777C2
oklch(55.6% 0.143 248.6)
-
Step 700
700 (this color)
#0665A9
oklch(49.6% 0.133 248.5)
-
Step 800
800
#0C5288
oklch(42.8% 0.11 248.4)
-
Step 900
900
#15446D
oklch(37.7% 0.086 248.8)
-
Step 950
950
#0E2840
oklch(27% 0.055 249)
#0665A9 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) | #4369AC | 0.044 |
| Deuteranopia (no green cones) | #295CA8 | 0.027 |
| Tritanopia (no blue cones) | #00767F | 0.095 |
| Achromatopsia (no color) | #626262 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0665A9
#0665A9
oklch(49.6% 0.133 248.5)
- #895400
#895400
oklch(49.5% 0.108 68.4)
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 #0665A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.027
- Peacock Blue #016795 ΔE 0.034
- Ocean Blue #03719C ΔE 0.045
- French Blue #436BAD ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.053
- Denim #3B638C ΔE 0.053
- Muted Blue #3B719F ΔE 0.054
Use #0665A9 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.