#2B7DBD
Closest named color: Windows Blue (#3778BF). oklch(57.2% 0.126 246.3), rgb(43, 125, 189).
Aa
Black text reads best on this color (4.77:1).
About this color
#2B7DBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.126 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.016 away. Black text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.77:1 |
| White text | 4.40:1 |
Values
| HEX | #2B7DBD |
| RGB | rgb(43, 125, 189) |
| HSL | hsl(206, 63%, 45%) |
| OKLCH | oklch(57.2% 0.126 246.3) |
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 #2B7DBD | 4.40:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #2B7DBD | 4.77:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #2B7DBD text on white | 4.40:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #2B7DBD text on black | 4.77:1 | AA | Lc -31.5 | Non-text elements, placeholder text |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A4C5E4
oklch(81% 0.057 246.9)
-
Step 400
400
#71A6D6
oklch(70.7% 0.09 246.8)
-
Step 500
500
#488FCB
oklch(63.1% 0.116 246.5)
-
Step 600
600 (this color)
#2B7DBD
oklch(57.2% 0.126 246.3)
-
Step 700
700
#16659E
oklch(49.1% 0.116 246.1)
-
Step 800
800
#175380
oklch(42.8% 0.096 245.8)
-
Step 900
900
#1A4567
oklch(37.8% 0.075 245.6)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#2B7DBD 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) | #5F80C0 | 0.050 |
| Deuteranopia (no green cones) | #4A72BC | 0.036 |
| Tritanopia (no blue cones) | #008C94 | 0.089 |
| Achromatopsia (no color) | #787878 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B7DBD
#2B7DBD
oklch(57.2% 0.126 246.3)
- #A86604
#A86604
oklch(57% 0.125 66.4)
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 #2B7DBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.016
- Nice Blue #107AB0 ΔE 0.026
- Steel Blue #4682B4 ΔE 0.031
- Water Blue #0E87CC ΔE 0.032
- Cool Blue #4984B8 ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.038
- Blue NCS #118AB2 ΔE 0.045
- Off Blue #5684AE ΔE 0.051
Use #2B7DBD 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.