#1A428D
Closest named color: Cobalt (#1E488F). oklch(39.7% 0.133 261.5), rgb(26, 66, 141).
Aa
White text reads best on this color (9.51:1).
About this color
#1A428D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.133 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.018 away. White text reads best on it, at 9.51:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.20:1 |
| White text | 9.51:1 |
Values
| HEX | #1A428D |
| RGB | rgb(26, 66, 141) |
| HSL | hsl(219, 69%, 33%) |
| OKLCH | oklch(39.7% 0.133 261.5) |
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 #1A428D | 9.51:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #1A428D | 2.20:1 | Fails | Lc 12.4 | Not readable |
| #1A428D text on white | 9.51:1 | AAA | Lc 91.5 | Preferred for body text |
| #1A428D text on black | 2.20:1 | Fails | Lc -10.8 | 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 900.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699EFF
oklch(70.6% 0.153 261.6)
-
Step 500
500
#3F82FF
oklch(63.1% 0.198 261.5)
-
Step 600
600
#1B66F2
oklch(55.6% 0.222 261.6)
-
Step 700
700
#0D54D2
oklch(49.1% 0.205 261.4)
-
Step 800
800
#0F46AA
oklch(42.8% 0.17 261.4)
-
Step 900
900 (this color)
#1A428D
oklch(39.7% 0.133 261.5)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#1A428D 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) | #0E4B90 | 0.025 |
| Deuteranopia (no green cones) | #00418C | 0.015 |
| Tritanopia (no blue cones) | #005461 | 0.102 |
| Achromatopsia (no color) | #464646 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A428D
#1A428D
oklch(39.7% 0.133 261.5)
- #5D4200
#5D4200
oklch(39.8% 0.082 82.1)
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 #1A428D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.018
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.045
- Dusk Blue #26538D ΔE 0.052
- Sapphire #2138AB ΔE 0.055
- Blueberry #464196 ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.058
Use #1A428D 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.