#1F2145
Closest named color: Oxford Blue (#1B263B). oklch(26.7% 0.066 278.5), rgb(31, 33, 69).
Aa
White text reads best on this color (15.42:1).
About this color
#1F2145 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.066 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.028 away. White text reads best on it, at 15.42:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.42:1 |
Values
| HEX | #1F2145 |
| RGB | rgb(31, 33, 69) |
| HSL | hsl(237, 38%, 20%) |
| OKLCH | oklch(26.7% 0.066 278.5) |
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 #1F2145 | 15.42:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #1F2145 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #1F2145 text on white | 15.42:1 | AAA | Lc 102.2 | Preferred for body text |
| #1F2145 text on black | 1.36:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F6
oklch(88.5% 0.043 278.2)
-
Step 300
300
#B5BCF3
oklch(80.9% 0.078 278.9)
-
Step 400
400
#8F98ED
oklch(70.7% 0.124 278.1)
-
Step 500
500
#767BE8
oklch(63.1% 0.161 278.7)
-
Step 600
600
#6062D6
oklch(55.6% 0.174 278.4)
-
Step 700
700
#5050B9
oklch(49.1% 0.162 278.6)
-
Step 800
800
#414296
oklch(42.6% 0.135 278.5)
-
Step 900
900
#373977
oklch(37.7% 0.104 278.8)
-
Step 950
950 (this color)
#1F2145
oklch(26.7% 0.066 278.5)
#1F2145 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) | #122646 | 0.022 |
| Deuteranopia (no green cones) | #0E2344 | 0.024 |
| Tritanopia (no blue cones) | #11292F | 0.059 |
| Achromatopsia (no color) | #252525 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2145
#1F2145
oklch(26.7% 0.066 278.5)
- #2D2600
#2D2600
oklch(26.8% 0.056 98.7)
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 #1F2145, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.028
- Dark #1B2431 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.048
- Jet #212529 ΔE 0.058
- Marine #042E60 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.062
- Gunmetal #293241 ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.063
Use #1F2145 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.