#151F49
Closest named color: Oxford Blue (#1B263B). oklch(25.7% 0.079 270), rgb(21, 31, 73).
Aa
White text reads best on this color (15.85:1).
About this color
#151F49 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.079 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 15.85:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.85:1 |
Values
| HEX | #151F49 |
| RGB | rgb(21, 31, 73) |
| HSL | hsl(228, 55%, 18%) |
| OKLCH | oklch(25.7% 0.079 270) |
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 #151F49 | 15.85:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #151F49 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #151F49 text on white | 15.85:1 | AAA | Lc 102.6 | Preferred for body text |
| #151F49 text on black | 1.32:1 | 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
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CBD8FD
oklch(88.4% 0.053 270)
-
Step 300
300
#A9BEFE
oklch(80.9% 0.094 270.2)
-
Step 400
400
#7C9AFE
oklch(70.8% 0.15 269.7)
-
Step 500
500
#5E7CFC
oklch(63% 0.193 270.1)
-
Step 600
600
#4761EB
oklch(55.5% 0.209 270)
-
Step 700
700
#394FCC
oklch(49% 0.194 269.9)
-
Step 800
800
#2F42A5
oklch(42.7% 0.16 269.9)
-
Step 900
900
#293983
oklch(37.7% 0.126 270.1)
-
Step 950
950 (this color)
#151F49
oklch(25.7% 0.079 270)
#151F49 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) | #06254A | 0.022 |
| Deuteranopia (no green cones) | #002048 | 0.023 |
| Tritanopia (no blue cones) | #002930 | 0.067 |
| Achromatopsia (no color) | #222222 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F49
#151F49
oklch(25.7% 0.079 270)
- #2D2200
#2D2200
oklch(25.8% 0.053 90.8)
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 #151F49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Dark #1B2431 ΔE 0.052
- Navy Blue #001146 ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.054
- Marine #042E60 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.064
- Jet #212529 ΔE 0.071
Use #151F49 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.