#2F66A3
Closest named color: Mid Blue (#276AB3). oklch(50.4% 0.114 253), rgb(47, 102, 163).
Aa
White text reads best on this color (5.91:1).
About this color
#2F66A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.114 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.026 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.55:1 |
| White text | 5.91:1 |
Values
| HEX | #2F66A3 |
| RGB | rgb(47, 102, 163) |
| HSL | hsl(212, 55%, 41%) |
| OKLCH | oklch(50.4% 0.114 253) |
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 #2F66A3 | 5.91:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #2F66A3 | 3.55:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #2F66A3 text on white | 5.91:1 | AA | Lc 79.3 | Fine for body text |
| #2F66A3 text on black | 3.55:1 | AA large text | Lc -22.5 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A8C3E4
oklch(80.8% 0.055 253.6)
-
Step 400
400
#79A4D6
oklch(70.7% 0.087 252.7)
-
Step 500
500
#558CCC
oklch(63% 0.113 253.3)
-
Step 600
600
#3975B9
oklch(55.5% 0.123 253.3)
-
Step 700
700 (this color)
#2F66A3
oklch(50.4% 0.114 253)
-
Step 800
800
#255081
oklch(42.6% 0.095 253.5)
-
Step 900
900
#234367
oklch(37.7% 0.073 252.7)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#2F66A3 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) | #4A6AA6 | 0.032 |
| Deuteranopia (no green cones) | #395FA2 | 0.020 |
| Tritanopia (no blue cones) | #00747C | 0.088 |
| Achromatopsia (no color) | #646464 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F66A3
#2F66A3
oklch(50.4% 0.114 253)
- #895900
#895900
oklch(50.5% 0.107 73)
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 #2F66A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.030
- Peacock Blue #016795 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.034
- Denim #3B638C ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.037
- Muted Blue #3B719F ΔE 0.037
- Ocean Blue #03719C ΔE 0.039
Use #2F66A3 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.