#1B254E
Closest named color: Oxford Blue (#1B263B). oklch(28% 0.076 270.5), rgb(27, 37, 78).
Aa
White text reads best on this color (14.77:1).
About this color
#1B254E is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.076 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 14.77:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.42:1 |
| White text | 14.77:1 |
Values
| HEX | #1B254E |
| RGB | rgb(27, 37, 78) |
| HSL | hsl(228, 49%, 21%) |
| OKLCH | oklch(28% 0.076 270.5) |
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 #1B254E | 14.77:1 | AAA | Lc -104.3 | Preferred for body text |
| Black text on #1B254E | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #1B254E text on white | 14.77:1 | AAA | Lc 101.5 | Preferred for body text |
| #1B254E 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
#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
#AABEFC
oklch(80.9% 0.091 270.5)
-
Step 400
400
#7F9AFA
oklch(70.7% 0.144 270.5)
-
Step 500
500
#617DF7
oklch(63.1% 0.184 270.6)
-
Step 600
600
#4A62E6
oklch(55.5% 0.201 270.6)
-
Step 700
700
#3C50C8
oklch(49% 0.187 270.6)
-
Step 800
800
#3143A2
oklch(42.7% 0.154 270.4)
-
Step 900
900
#2B3A80
oklch(37.8% 0.119 270.6)
-
Step 950
950 (this color)
#1B254E
oklch(28% 0.076 270.5)
#1B254E 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) | #112A50 | 0.018 |
| Deuteranopia (no green cones) | #09264D | 0.020 |
| Tritanopia (no blue cones) | #002E35 | 0.067 |
| Achromatopsia (no color) | #282828 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B254E
#1B254E
oklch(28% 0.076 270.5)
- #342700
#342700
oklch(28% 0.057 89.5)
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 #1B254E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Marine #042E60 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.051
- Dark #1B2431 ΔE 0.054
- Gunmetal #293241 ΔE 0.059
- Dark Indigo #1F0954 ΔE 0.067
- Midnight Blue #191970 ΔE 0.068
Use #1B254E 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.