#01273F
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.061 242.1), rgb(1, 39, 63).
Aa
White text reads best on this color (15.40:1).
About this color
#01273F is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.061 and its hue 242°. 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 15.40:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.40:1 |
Values
| HEX | #01273F |
| RGB | rgb(1, 39, 63) |
| HSL | hsl(203, 97%, 13%) |
| OKLCH | oklch(26.1% 0.061 242.1) |
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 #01273F | 15.40:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #01273F | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #01273F text on white | 15.40:1 | AAA | Lc 102.0 | Preferred for body text |
| #01273F 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C3DDF2
oklch(88.5% 0.04 242.4)
-
Step 300
300
#98C7EC
oklch(80.9% 0.072 242.5)
-
Step 400
400
#59A9E2
oklch(70.8% 0.115 241.9)
-
Step 500
500
#0C92DA
oklch(63.2% 0.147 241.8)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679D
oklch(49.2% 0.117 242)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950 (this color)
#01273F
oklch(26.1% 0.061 242.1)
#01273F 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) | #1B2840 | 0.028 |
| Deuteranopia (no green cones) | #12223F | 0.021 |
| Tritanopia (no blue cones) | #002D30 | 0.040 |
| Achromatopsia (no color) | #252525 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01273F
#01273F
oklch(26.1% 0.061 242.1)
- #381C00
#381C00
oklch(26% 0.06 61.8)
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 #01273F, 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 0.035
- Rich Black #0D1B2A ΔE 0.051
- Jet #212529 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.058
- Marine #042E60 ΔE 0.063
- Gunmetal #293241 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.069
Use #01273F 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.