#2F66B5
Closest named color: Mid Blue (#276AB3). oklch(51.5% 0.138 257.8), rgb(47, 102, 181).
Aa
White text reads best on this color (5.69:1).
About this color
#2F66B5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.138 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.013 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #2F66B5 |
| RGB | rgb(47, 102, 181) |
| HSL | hsl(215, 59%, 45%) |
| OKLCH | oklch(51.5% 0.138 257.8) |
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 #2F66B5 | 5.69:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #2F66B5 | 3.68:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #2F66B5 text on white | 5.69:1 | AA | Lc 78.1 | Fine for body text |
| #2F66B5 text on black | 3.68:1 | AA large text | Lc -23.7 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C3EC
oklch(81% 0.066 257)
-
Step 400
400
#76A2E3
oklch(70.7% 0.107 258)
-
Step 500
500
#5289DB
oklch(63% 0.137 258.2)
-
Step 600
600
#3572C8
oklch(55.6% 0.148 257.5)
-
Step 700
700 (this color)
#2F66B5
oklch(51.5% 0.138 257.8)
-
Step 800
800
#224E8C
oklch(42.7% 0.114 257.5)
-
Step 900
900
#214170
oklch(37.6% 0.089 258)
-
Step 950
950
#142642
oklch(26.9% 0.058 258.9)
#2F66B5 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) | #3F6DB8 | 0.026 |
| Deuteranopia (no green cones) | #2661B3 | 0.017 |
| Tritanopia (no blue cones) | #007984 | 0.109 |
| Achromatopsia (no color) | #676767 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F66B5
#2F66B5
oklch(51.5% 0.138 257.8)
- #895E00
#895E00
oklch(51.5% 0.107 77.6)
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 #2F66B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.013
- French Blue #436BAD ΔE 0.029
- Flat Blue #3C73A8 ΔE 0.048
- Windows Blue #3778BF ΔE 0.052
- Muted Blue #3B719F ΔE 0.053
- Dusky Blue #475F94 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.059
- Nice Blue #107AB0 ΔE 0.059
Use #2F66B5 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.