#1F4FAD
Closest named color: Blue Blue (#2242C7). oklch(45.3% 0.16 261.9), rgb(31, 79, 173).
Aa
White text reads best on this color (7.55:1).
About this color
#1F4FAD is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.160 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.051 away. White text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.78:1 |
| White text | 7.55:1 |
Values
| HEX | #1F4FAD |
| RGB | rgb(31, 79, 173) |
| HSL | hsl(220, 70%, 40%) |
| OKLCH | oklch(45.3% 0.16 261.9) |
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 #1F4FAD | 7.55:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #1F4FAD | 2.78:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #1F4FAD text on white | 7.55:1 | AAA | Lc 85.7 | Fine for body text |
| #1F4FAD text on black | 2.78:1 | Fails | Lc -16.3 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#A0C1FD
oklch(80.9% 0.093 262.1)
-
Step 400
400
#6C9EFD
oklch(70.6% 0.15 262.2)
-
Step 500
500
#4583FB
oklch(63.2% 0.191 262)
-
Step 600
600
#2668EA
oklch(55.5% 0.208 262)
-
Step 700
700
#1A56CB
oklch(49.1% 0.192 261.9)
-
Step 800
800 (this color)
#1F4FAD
oklch(45.3% 0.16 261.9)
-
Step 900
900
#193D82
oklch(37.7% 0.124 261.8)
-
Step 950
950
#10244C
oklch(26.9% 0.079 262.4)
#1F4FAD 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) | #005BB0 | 0.031 |
| Deuteranopia (no green cones) | #004EAB | 0.016 |
| Tritanopia (no blue cones) | #006676 | 0.123 |
| Achromatopsia (no color) | #545454 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4FAD
#1F4FAD
oklch(45.3% 0.16 261.9)
- #705000
#705000
oklch(45.4% 0.094 81.9)
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 #1F4FAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.051
- Cobalt #1E488F ΔE 0.051
- Dusk Blue #26538D ΔE 0.055
- Sapphire #2138AB ΔE 0.055
- Blueberry #464196 ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.066
- Light Navy #155084 ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.072
Use #1F4FAD 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.