#1B254D
Closest named color: Oxford Blue (#1B263B). oklch(27.9% 0.075 270.4), rgb(27, 37, 77).
Aa
White text reads best on this color (14.80:1).
About this color
#1B254D is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.075 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.035 away. White text reads best on it, at 14.80:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.41:1 |
| White text | 14.80:1 |
Values
| HEX | #1B254D |
| RGB | rgb(27, 37, 77) |
| HSL | hsl(228, 48%, 20%) |
| OKLCH | oklch(27.9% 0.075 270.4) |
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 #1B254D | 14.80:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #1B254D | 1.41:1 | Fails | Lc 0.0 | Not readable |
| #1B254D text on white | 14.80:1 | AAA | Lc 101.5 | Preferred for body text |
| #1B254D text on black | 1.41:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#ABBEFB
oklch(80.9% 0.089 270.9)
-
Step 400
400
#7F9AF8
oklch(70.6% 0.141 270.4)
-
Step 500
500
#617EF5
oklch(63.1% 0.18 270.2)
-
Step 600
600
#4A63E4
oklch(55.5% 0.197 270.4)
-
Step 700
700
#3C51C6
oklch(49% 0.183 270.4)
-
Step 800
800
#3243A0
oklch(42.6% 0.151 270.7)
-
Step 900
900
#2B3A7F
oklch(37.7% 0.118 270.6)
-
Step 950
950 (this color)
#1B254D
oklch(27.9% 0.075 270.4)
#1B254D 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) | #122A4E | 0.017 |
| Deuteranopia (no green cones) | #0A264C | 0.019 |
| Tritanopia (no blue cones) | #002E35 | 0.065 |
| Achromatopsia (no color) | #282828 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B254D
#1B254D
oklch(27.9% 0.075 270.4)
- #332700
#332700
oklch(27.9% 0.057 91)
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 #1B254D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.035
- Marine #042E60 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.052
- Dark #1B2431 ΔE 0.052
- Gunmetal #293241 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.067
- Jet #212529 ΔE 0.068
Use #1B254D 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.