#1A43AA
Closest named color: Sapphire (#2138AB). oklch(42.4% 0.172 263.9), rgb(26, 67, 170).
Aa
White text reads best on this color (8.65:1).
About this color
#1A43AA is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.172 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.025 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #1A43AA |
| RGB | rgb(26, 67, 170) |
| HSL | hsl(223, 73%, 38%) |
| OKLCH | oklch(42.4% 0.172 263.9) |
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 #1A43AA | 8.65:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #1A43AA | 2.42:1 | Fails | Lc 15.0 | Not readable |
| #1A43AA text on white | 8.65:1 | AAA | Lc 89.0 | Fine for body text |
| #1A43AA text on black | 2.42:1 | Fails | Lc -13.2 | 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
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4980FF
oklch(63% 0.198 264)
-
Step 600
600
#2B64F3
oklch(55.6% 0.223 263.9)
-
Step 700
700
#1F51D4
oklch(49.1% 0.208 264.1)
-
Step 800
800 (this color)
#1A43AA
oklch(42.4% 0.172 263.9)
-
Step 900
900
#1B3B87
oklch(37.7% 0.133 263.9)
-
Step 950
950
#10234F
oklch(26.9% 0.085 264)
#1A43AA 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) | #0052AD | 0.037 |
| Deuteranopia (no green cones) | #0045A8 | 0.013 |
| Tritanopia (no blue cones) | #005E70 | 0.133 |
| Achromatopsia (no color) | #4C4C4C | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A43AA
#1A43AA
oklch(42.4% 0.172 263.9)
- #654900
#654900
oklch(42.4% 0.087 83.3)
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 #1A43AA, closest first.
No curated palette has a color within ΔE 0.04 of #1A43AA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.025
- Cobalt #1E488F ΔE 0.047
- Blue Blue #2242C7 ΔE 0.047
- Blueberry #464196 ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.065
- Dusk Blue #26538D ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.074
- Light Navy #155084 ΔE 0.075
Use #1A43AA 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.