#01273B
Closest named color: Oxford Blue (#1B263B). oklch(25.9% 0.056 237.3), rgb(1, 39, 59).
Aa
White text reads best on this color (15.50:1).
About this color
#01273B is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.056 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.027 away. White text reads best on it, at 15.50:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.35:1 |
| White text | 15.50:1 |
Values
| HEX | #01273B |
| RGB | rgb(1, 39, 59) |
| HSL | hsl(201, 97%, 12%) |
| OKLCH | oklch(25.9% 0.056 237.3) |
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 #01273B | 15.50:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #01273B | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #01273B text on white | 15.50:1 | AAA | Lc 102.2 | Preferred for body text |
| #01273B text on black | 1.35:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C3DDEF
oklch(88.4% 0.037 238.1)
-
Step 300
300
#99C8E6
oklch(81% 0.065 236.6)
-
Step 400
400
#5AAADA
oklch(70.7% 0.105 237.2)
-
Step 500
500
#1294D0
oklch(63.2% 0.134 237)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950 (this color)
#01273B
oklch(25.9% 0.056 237.3)
#01273B 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) | #1D273C | 0.031 |
| Deuteranopia (no green cones) | #15223B | 0.024 |
| Tritanopia (no blue cones) | #002C2E | 0.035 |
| Achromatopsia (no color) | #242424 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01273B
#01273B
oklch(25.9% 0.056 237.3)
- #371C04
#371C04
oklch(25.9% 0.055 58.7)
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 #01273B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.027
- Dark #1B2431 ΔE 0.031
- Jet #212529 ΔE 0.046
- Rich Black #0D1B2A ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.060
- Gunmetal #293241 ΔE 0.064
- Marine #042E60 ΔE 0.070
- Midnight Green #073B4C ΔE 0.071
Use #01273B 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.