#1D71BC
Closest named color: Mid Blue (#276AB3). oklch(54% 0.14 250.6), rgb(29, 113, 188).
Aa
White text reads best on this color (5.07:1).
About this color
#1D71BC is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.140 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.022 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #1D71BC |
| RGB | rgb(29, 113, 188) |
| HSL | hsl(208, 73%, 43%) |
| OKLCH | oklch(54% 0.14 250.6) |
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 #1D71BC | 5.07:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #1D71BC | 4.14:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #1D71BC text on white | 5.07:1 | AA | Lc 74.5 | Content text, not long reading |
| #1D71BC text on black | 4.14:1 | AA large text | Lc -27.2 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E9
oklch(80.9% 0.064 251.5)
-
Step 400
400
#6FA5DD
oklch(70.7% 0.1 250.3)
-
Step 500
500
#468DD4
oklch(63% 0.129 250.6)
-
Step 600
600 (this color)
#1D71BC
oklch(54% 0.14 250.6)
-
Step 700
700
#1563A7
oklch(49.2% 0.13 250.5)
-
Step 800
800
#155187
oklch(42.7% 0.107 250.3)
-
Step 900
900
#1A436C
oklch(37.6% 0.084 251.1)
-
Step 950
950
#10283F
oklch(27% 0.053 249.5)
#1D71BC 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) | #4C76BF | 0.042 |
| Deuteranopia (no green cones) | #3268BB | 0.026 |
| Tritanopia (no blue cones) | #00838D | 0.103 |
| Achromatopsia (no color) | #6E6E6E | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D71BC
#1D71BC
oklch(54% 0.14 250.6)
- #986100
#986100
oklch(54% 0.116 71.1)
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 #1D71BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.022
- Windows Blue #3778BF ΔE 0.028
- French Blue #436BAD ΔE 0.035
- Nice Blue #107AB0 ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.038
- Muted Blue #3B719F ΔE 0.049
- Ocean Blue #03719C ΔE 0.053
- Water Blue #0E87CC ΔE 0.062
Use #1D71BC 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.