#1A355F
Closest named color: Prussian Blue (#1D3557). oklch(33.2% 0.082 259), rgb(26, 53, 95).
Aa
White text reads best on this color (12.22:1).
About this color
#1A355F is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.082 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.014 away. White text reads best on it, at 12.22:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.22:1 |
Values
| HEX | #1A355F |
| RGB | rgb(26, 53, 95) |
| HSL | hsl(217, 57%, 24%) |
| OKLCH | oklch(33.2% 0.082 259) |
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 #1A355F | 12.22:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #1A355F | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #1A355F text on white | 12.22:1 | AAA | Lc 97.7 | Preferred for body text |
| #1A355F text on black | 1.71:1 | Fails | Lc 0.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#A9C2E9
oklch(80.9% 0.062 259.2)
-
Step 400
400
#7BA2DE
oklch(70.7% 0.098 258.8)
-
Step 500
500
#5989D4
oklch(63% 0.125 259)
-
Step 600
600
#3F72C2
oklch(55.6% 0.136 259.1)
-
Step 700
700
#315FA7
oklch(49.1% 0.126 259.1)
-
Step 800
800
#294E87
oklch(42.7% 0.104 258.8)
-
Step 900
900 (this color)
#1A355F
oklch(33.2% 0.082 259)
-
Step 950
950
#16263F
oklch(26.8% 0.052 259)
#1A355F 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) | #223961 | 0.017 |
| Deuteranopia (no green cones) | #17325E | 0.010 |
| Tritanopia (no blue cones) | #003F45 | 0.066 |
| Achromatopsia (no color) | #353535 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A355F
#1A355F
oklch(33.2% 0.082 259)
- #493100
#493100
oklch(33.3% 0.069 78.9)
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 #1A355F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.014
- Marine Blue #01386A ΔE 0.024
- Marine #042E60 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.042
- Midnight Green #073B4C ΔE 0.046
- Gunmetal #293241 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.057
Use #1A355F 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.