#1A233C
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.049 267.9), rgb(26, 35, 60).
Aa
White text reads best on this color (15.56:1).
About this color
#1A233C is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.049 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.011 away. White text reads best on it, at 15.56:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.56:1 |
Values
| HEX | #1A233C |
| RGB | rgb(26, 35, 60) |
| HSL | hsl(224, 40%, 17%) |
| OKLCH | oklch(26.1% 0.049 267.9) |
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 #1A233C | 15.56:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #1A233C | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #1A233C text on white | 15.56:1 | AAA | Lc 102.4 | Preferred for body text |
| #1A233C 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#889FDB
oklch(70.8% 0.092 267.9)
-
Step 500
500
#6B86D1
oklch(63.2% 0.118 267.9)
-
Step 600
600
#536EBE
oklch(55.6% 0.128 268)
-
Step 700
700
#435CA4
oklch(49.1% 0.119 267.5)
-
Step 800
800
#384B85
oklch(42.7% 0.099 268.3)
-
Step 900
900
#303F6B
oklch(37.7% 0.078 268.3)
-
Step 950
950 (this color)
#1A233C
oklch(26.1% 0.049 267.9)
#1A233C 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) | #19253D | 0.007 |
| Deuteranopia (no green cones) | #16223B | 0.007 |
| Tritanopia (no blue cones) | #0C282C | 0.044 |
| Achromatopsia (no color) | #242424 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A233C
#1A233C
oklch(26.1% 0.049 267.9)
- #2E2304
#2E2304
oklch(26.2% 0.049 89)
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 #1A233C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.011
- Dark #1B2431 ΔE 0.022
- Jet #212529 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.046
- Rich Black #0D1B2A ΔE 0.047
- Gunmetal #293241 ΔE 0.058
- Marine #042E60 ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.070
Use #1A233C 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.