#1F71B0
Closest named color: Mid Blue (#276AB3). oklch(53.3% 0.125 246.9), rgb(31, 113, 176).
Aa
White text reads best on this color (5.18:1).
About this color
#1F71B0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.125 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.021 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #1F71B0 |
| RGB | rgb(31, 113, 176) |
| HSL | hsl(206, 70%, 41%) |
| OKLCH | oklch(53.3% 0.125 246.9) |
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 #1F71B0 | 5.18:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #1F71B0 | 4.04:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #1F71B0 text on white | 5.18:1 | AA | Lc 75.3 | Fine for body text |
| #1F71B0 text on black | 4.04:1 | AA large text | Lc -26.4 | 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
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A4C5E3
oklch(80.9% 0.055 246)
-
Step 400
400
#72A6D6
oklch(70.7% 0.09 247.2)
-
Step 500
500
#4A8FCB
oklch(63.1% 0.115 247.1)
-
Step 600
600 (this color)
#1F71B0
oklch(53.3% 0.125 246.9)
-
Step 700
700
#19659E
oklch(49.2% 0.115 246.5)
-
Step 800
800
#195280
oklch(42.6% 0.096 247.2)
-
Step 900
900
#1C4467
oklch(37.6% 0.075 247.8)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#1F71B0 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) | #5374B3 | 0.047 |
| Deuteranopia (no green cones) | #3E67AF | 0.033 |
| Tritanopia (no blue cones) | #008088 | 0.088 |
| Achromatopsia (no color) | #6D6D6D | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F71B0
#1F71B0
oklch(53.3% 0.125 246.9)
- #995D00
#995D00
oklch(53.3% 0.118 67.3)
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 #1F71B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.026
- French Blue #436BAD ΔE 0.029
- Muted Blue #3B719F ΔE 0.032
- Ocean Blue #03719C ΔE 0.035
- Windows Blue #3778BF ΔE 0.035
- Sea Blue #047495 ΔE 0.048
Use #1F71B0 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.