#1F45AC
Closest named color: Sapphire (#2138AB). oklch(43.2% 0.171 264.6), rgb(31, 69, 172).
Aa
White text reads best on this color (8.38:1).
About this color
#1F45AC is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.171 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.030 away. White text reads best on it, at 8.38:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.50:1 |
| White text | 8.38:1 |
Values
| HEX | #1F45AC |
| RGB | rgb(31, 69, 172) |
| HSL | hsl(224, 69%, 40%) |
| OKLCH | oklch(43.2% 0.171 264.6) |
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 #1F45AC | 8.38:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #1F45AC | 2.50:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #1F45AC text on white | 8.38:1 | AAA | Lc 88.3 | Fine for body text |
| #1F45AC text on black | 2.50:1 | Fails | Lc -13.9 | Not readable |
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
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719DFF
oklch(70.8% 0.152 264.6)
-
Step 500
500
#4C80FF
oklch(63.2% 0.197 264.6)
-
Step 600
600
#2F63F2
oklch(55.5% 0.222 264.7)
-
Step 700
700
#2351D3
oklch(49.1% 0.206 264.7)
-
Step 800
800 (this color)
#1F45AC
oklch(43.2% 0.171 264.6)
-
Step 900
900
#1D3B87
oklch(37.8% 0.132 264.6)
-
Step 950
950
#11234F
oklch(27% 0.084 264.6)
#1F45AC 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) | #0054AF | 0.038 |
| Deuteranopia (no green cones) | #0047AA | 0.016 |
| Tritanopia (no blue cones) | #005F71 | 0.132 |
| Achromatopsia (no color) | #4E4E4E | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F45AC
#1F45AC
oklch(43.2% 0.171 264.6)
- #674B00
#674B00
oklch(43.1% 0.089 83.9)
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 #1F45AC, closest first.
No curated palette has a color within ΔE 0.04 of #1F45AC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.030
- Blue Blue #2242C7 ΔE 0.044
- Cobalt #1E488F ΔE 0.049
- Blueberry #464196 ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.062
- Dusk Blue #26538D ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.073
- Light Navy #155084 ΔE 0.075
Use #1F45AC 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.