#1F72BA
Closest named color: Mid Blue (#276AB3). oklch(54.1% 0.136 249.7), rgb(31, 114, 186).
Aa
White text reads best on this color (5.03:1).
About this color
#1F72BA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.136 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.023 away. White text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #1F72BA |
| RGB | rgb(31, 114, 186) |
| HSL | hsl(208, 71%, 43%) |
| OKLCH | oklch(54.1% 0.136 249.7) |
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 #1F72BA | 5.03:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #1F72BA | 4.17:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #1F72BA text on white | 5.03:1 | AA | Lc 74.3 | Content text, not long reading |
| #1F72BA text on black | 4.17:1 | AA large text | Lc -27.4 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#70A5DB
oklch(70.6% 0.098 249.8)
-
Step 500
500
#478ED2
oklch(63.2% 0.125 249.6)
-
Step 600
600 (this color)
#1F72BA
oklch(54.1% 0.136 249.7)
-
Step 700
700
#1663A5
oklch(49% 0.127 250)
-
Step 800
800
#165185
oklch(42.6% 0.105 249.7)
-
Step 900
900
#1A446B
oklch(37.8% 0.082 249.5)
-
Step 950
950
#11283F
oklch(27.1% 0.052 250.3)
#1F72BA 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) | #4F76BD | 0.043 |
| Deuteranopia (no green cones) | #3769B9 | 0.027 |
| Tritanopia (no blue cones) | #00838D | 0.098 |
| Achromatopsia (no color) | #6F6F6F | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F72BA
#1F72BA
oklch(54.1% 0.136 249.7)
- #9A6000
#9A6000
oklch(54.1% 0.118 69.2)
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 #1F72BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.023
- Windows Blue #3778BF ΔE 0.026
- Nice Blue #107AB0 ΔE 0.031
- French Blue #436BAD ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.034
- Muted Blue #3B719F ΔE 0.045
- Ocean Blue #03719C ΔE 0.050
- Dull Blue #49759C ΔE 0.058
Use #1F72BA 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.