#2B71AD
Closest named color: Flat Blue (#3C73A8). oklch(53.4% 0.117 248.1), rgb(43, 113, 173).
Aa
White text reads best on this color (5.16:1).
About this color
#2B71AD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.117 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.017 away. White text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #2B71AD |
| RGB | rgb(43, 113, 173) |
| HSL | hsl(208, 60%, 42%) |
| OKLCH | oklch(53.4% 0.117 248.1) |
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 #2B71AD | 5.16:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #2B71AD | 4.06:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #2B71AD text on white | 5.16:1 | AA | Lc 75.2 | Fine for body text |
| #2B71AD text on black | 4.06:1 | AA large text | Lc -26.5 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A6C4E2
oklch(80.8% 0.054 248.5)
-
Step 400
400
#76A5D3
oklch(70.6% 0.085 248.6)
-
Step 500
500
#518EC7
oklch(63% 0.107 248.4)
-
Step 600
600 (this color)
#2B71AD
oklch(53.4% 0.117 248.1)
-
Step 700
700
#24649B
oklch(49% 0.109 248.3)
-
Step 800
800
#20527E
oklch(42.7% 0.091 248.3)
-
Step 900
900
#204465
oklch(37.7% 0.07 248.4)
-
Step 950
950
#14283B
oklch(27% 0.044 248.6)
#2B71AD 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) | #5574B0 | 0.043 |
| Deuteranopia (no green cones) | #4368AC | 0.030 |
| Tritanopia (no blue cones) | #007F87 | 0.085 |
| Achromatopsia (no color) | #6D6D6D | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B71AD
#2B71AD
oklch(53.4% 0.117 248.1)
- #985E00
#985E00
oklch(53.4% 0.117 68.6)
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 #2B71AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.017
- Mid Blue #276AB3 ΔE 0.024
- French Blue #436BAD ΔE 0.024
- Muted Blue #3B719F ΔE 0.025
- Nice Blue #107AB0 ΔE 0.026
- Ocean Blue #03719C ΔE 0.034
- Windows Blue #3778BF ΔE 0.035
- Dull Blue #49759C ΔE 0.041
Use #2B71AD 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.