#1F4AB0
Closest named color: Blue Blue (#2242C7). oklch(44.5% 0.17 263.6), rgb(31, 74, 176).
Aa
White text reads best on this color (7.88:1).
About this color
#1F4AB0 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.170 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.040 away. White text reads best on it, at 7.88:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #1F4AB0 |
| RGB | rgb(31, 74, 176) |
| HSL | hsl(222, 70%, 41%) |
| OKLCH | oklch(44.5% 0.17 263.6) |
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 #1F4AB0 | 7.88:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #1F4AB0 | 2.66:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #1F4AB0 text on white | 7.88:1 | AAA | Lc 86.7 | Fine for body text |
| #1F4AB0 text on black | 2.66:1 | Fails | Lc -15.4 | 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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600
#2A65F2
oklch(55.7% 0.221 263.6)
-
Step 700
700
#1E52D2
oklch(49% 0.205 263.7)
-
Step 800
800 (this color)
#1F4AB0
oklch(44.5% 0.17 263.6)
-
Step 900
900
#1A3B86
oklch(37.6% 0.132 263.5)
-
Step 950
950
#10234F
oklch(26.9% 0.085 264)
#1F4AB0 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) | #0058B3 | 0.035 |
| Deuteranopia (no green cones) | #004BAE | 0.015 |
| Tritanopia (no blue cones) | #006475 | 0.133 |
| Achromatopsia (no color) | #515151 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4AB0
#1F4AB0
oklch(44.5% 0.17 263.6)
- #6C4F00
#6C4F00
oklch(44.6% 0.092 84.1)
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 #1F4AB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.040
- Sapphire #2138AB ΔE 0.043
- Cobalt #1E488F ΔE 0.054
- Blueberry #464196 ΔE 0.061
- Majorelle Blue #3F37C9 ΔE 0.061
- Dusk Blue #26538D ΔE 0.065
- Blue With A Hint Of Purple #533CC6 ΔE 0.075
- Light Navy #155084 ΔE 0.076
Use #1F4AB0 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.