#2B71BE
Closest named color: Windows Blue (#3778BF). oklch(54.4% 0.139 253.5), rgb(43, 113, 190).
Aa
White text reads best on this color (4.99:1).
About this color
#2B71BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.139 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.023 away. White text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #2B71BE |
| RGB | rgb(43, 113, 190) |
| HSL | hsl(211, 63%, 46%) |
| OKLCH | oklch(54.4% 0.139 253.5) |
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 #2B71BE | 4.99:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #2B71BE | 4.20:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #2B71BE text on white | 4.99:1 | AA | Lc 74.1 | Content text, not long reading |
| #2B71BE text on black | 4.20:1 | AA large text | Lc -27.6 | 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 600.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A5C4E9
oklch(81% 0.062 253.1)
-
Step 400
400
#74A4DE
oklch(70.8% 0.1 253.7)
-
Step 500
500
#4E8CD5
oklch(63.2% 0.128 253.8)
-
Step 600
600 (this color)
#2B71BE
oklch(54.4% 0.139 253.5)
-
Step 700
700
#2161A7
oklch(49% 0.129 253.7)
-
Step 800
800
#1E5088
oklch(42.8% 0.107 253.7)
-
Step 900
900
#1E436C
oklch(37.7% 0.082 252.9)
-
Step 950
950
#132740
oklch(27% 0.054 254.9)
#2B71BE 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) | #4C77C1 | 0.036 |
| Deuteranopia (no green cones) | #3369BC | 0.021 |
| Tritanopia (no blue cones) | #00838E | 0.105 |
| Achromatopsia (no color) | #6F6F6F | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B71BE
#2B71BE
oklch(54.4% 0.139 253.5)
- #986400
#986400
oklch(54.6% 0.116 73.7)
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 #2B71BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.023
- Mid Blue #276AB3 ΔE 0.025
- French Blue #436BAD ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.038
- Nice Blue #107AB0 ΔE 0.038
- Muted Blue #3B719F ΔE 0.050
- Ocean Blue #03719C ΔE 0.059
- Water Blue #0E87CC ΔE 0.060
Use #2B71BE 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.