#1F4ABA
Closest named color: Blue Blue (#2242C7). oklch(45.4% 0.183 264.2), rgb(31, 74, 186).
Aa
White text reads best on this color (7.64:1).
About this color
#1F4ABA is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.183 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.027 away. White text reads best on it, at 7.64:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #1F4ABA |
| RGB | rgb(31, 74, 186) |
| HSL | hsl(223, 71%, 43%) |
| OKLCH | oklch(45.4% 0.183 264.2) |
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 #1F4ABA | 7.64:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #1F4ABA | 2.74:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #1F4ABA text on white | 7.64:1 | AAA | Lc 85.9 | Fine for body text |
| #1F4ABA text on black | 2.74:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#2761FB
oklch(55.7% 0.237 264.2)
-
Step 700
700
#1B4EDB
oklch(49% 0.221 264.2)
-
Step 800
800 (this color)
#1F4ABA
oklch(45.4% 0.183 264.2)
-
Step 900
900
#19398C
oklch(37.7% 0.143 264.4)
-
Step 950
950
#0F2352
oklch(27.1% 0.09 264)
#1F4ABA 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) | #005BBE | 0.042 |
| Deuteranopia (no green cones) | #004CB8 | 0.014 |
| Tritanopia (no blue cones) | #00677B | 0.141 |
| Achromatopsia (no color) | #535353 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4ABA
#1F4ABA
oklch(45.4% 0.183 264.2)
- #6E5100
#6E5100
oklch(45.3% 0.093 84.6)
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 #1F4ABA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.027
- Sapphire #2138AB ΔE 0.048
- Majorelle Blue #3F37C9 ΔE 0.052
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
- Cobalt #1E488F ΔE 0.070
- Blueberry #464196 ΔE 0.072
- Blurple #5539CC ΔE 0.075
- Dusk Blue #26538D ΔE 0.079
Use #1F4ABA 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.