#1B225A
Closest named color: Marine (#042E60). oklch(28.3% 0.1 272.9), rgb(27, 34, 90).
Aa
White text reads best on this color (14.75:1).
About this color
#1B225A is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.100 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.037 away. White text reads best on it, at 14.75:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.42:1 |
| White text | 14.75:1 |
Values
| HEX | #1B225A |
| RGB | rgb(27, 34, 90) |
| HSL | hsl(233, 54%, 23%) |
| OKLCH | oklch(28.3% 0.1 272.9) |
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 #1B225A | 14.75:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #1B225A | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #1B225A text on white | 14.75:1 | AAA | Lc 101.3 | Preferred for body text |
| #1B225A text on black | 1.42:1 | 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 950.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CCD7FF
oklch(88.4% 0.057 273.1)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8298FF
oklch(70.8% 0.152 272.8)
-
Step 500
500
#6579FF
oklch(63.1% 0.198 273)
-
Step 600
600
#4D55FF
oklch(55.5% 0.246 273)
-
Step 700
700
#3E3EE7
oklch(49.1% 0.244 272.8)
-
Step 800
800
#3235BB
oklch(42.7% 0.203 272.8)
-
Step 900
900
#2A3193
oklch(37.6% 0.158 272.8)
-
Step 950
950 (this color)
#1B225A
oklch(28.3% 0.1 272.9)
#1B225A 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) | #002B5C | 0.032 |
| Deuteranopia (no green cones) | #002559 | 0.027 |
| Tritanopia (no blue cones) | #00303A | 0.084 |
| Achromatopsia (no color) | #282828 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B225A
#1B225A
oklch(28.3% 0.1 272.9)
- #342900
#342900
oklch(28.5% 0.058 93.2)
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 #1B225A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.037
- Midnight Blue #191970 ΔE 0.044
- Dark Indigo #1F0954 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.066
- Marine Blue #01386A ΔE 0.067
- Darkblue #030764 ΔE 0.070
Use #1B225A 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.