#1D223D
Closest named color: Oxford Blue (#1B263B). oklch(26.2% 0.051 274.4), rgb(29, 34, 61).
Aa
White text reads best on this color (15.57:1).
About this color
#1D223D is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.051 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.015 away. White text reads best on it, at 15.57:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.57:1 |
Values
| HEX | #1D223D |
| RGB | rgb(29, 34, 61) |
| HSL | hsl(231, 36%, 18%) |
| OKLCH | oklch(26.2% 0.051 274.4) |
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 #1D223D | 15.57:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #1D223D | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #1D223D text on white | 15.57:1 | AAA | Lc 102.5 | Preferred for body text |
| #1D223D text on black | 1.34:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B4BEE8
oklch(80.8% 0.06 274.5)
-
Step 400
400
#8E9CDD
oklch(70.7% 0.097 274.3)
-
Step 500
500
#7382D4
oklch(63.1% 0.124 274.4)
-
Step 600
600
#5D6AC1
oklch(55.6% 0.135 274.8)
-
Step 700
700
#4C58A7
oklch(49.1% 0.126 274.3)
-
Step 800
800
#3F4887
oklch(42.6% 0.104 275)
-
Step 900
900
#353D6C
oklch(37.7% 0.081 274.6)
-
Step 950
950 (this color)
#1D223D
oklch(26.2% 0.051 274.4)
#1D223D 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) | #18253E | 0.011 |
| Deuteranopia (no green cones) | #15233C | 0.012 |
| Tritanopia (no blue cones) | #12282C | 0.046 |
| Achromatopsia (no color) | #242424 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D223D
#1D223D
oklch(26.2% 0.051 274.4)
- #2C2402
#2C2402
oklch(26.2% 0.051 95.8)
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 #1D223D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.015
- Dark #1B2431 ΔE 0.026
- Jet #212529 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.045
- Rich Black #0D1B2A ΔE 0.050
- Gunmetal #293241 ΔE 0.059
- Marine #042E60 ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.070
Use #1D223D 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.