#01439F
Closest named color: Sapphire (#2138AB). oklch(40.9% 0.161 259.4), rgb(1, 67, 159).
Aa
White text reads best on this color (9.11:1).
About this color
#01439F is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.161 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.034 away. White text reads best on it, at 9.11:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #01439F |
| RGB | rgb(1, 67, 159) |
| HSL | hsl(215, 99%, 31%) |
| OKLCH | oklch(40.9% 0.161 259.4) |
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 #01439F | 9.11:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #01439F | 2.30:1 | Fails | Lc 13.8 | Not readable |
| #01439F text on white | 9.11:1 | AAA | Lc 90.1 | Preferred for body text |
| #01439F text on black | 2.30:1 | Fails | Lc -12.2 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FE
oklch(80.9% 0.094 259.9)
-
Step 400
400
#66A0FD
oklch(70.7% 0.15 259.4)
-
Step 500
500
#3984FB
oklch(63% 0.193 259.5)
-
Step 600
600
#116AEA
oklch(55.5% 0.209 259.4)
-
Step 700
700
#0057CC
oklch(49% 0.195 259.5)
-
Step 800
800 (this color)
#01439F
oklch(40.9% 0.161 259.4)
-
Step 900
900
#123E83
oklch(37.8% 0.126 259.5)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#01439F 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) | #004FA2 | 0.032 |
| Deuteranopia (no green cones) | #00429D | 0.004 |
| Tritanopia (no blue cones) | #005A6A | 0.121 |
| Achromatopsia (no color) | #484848 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01439F
#01439F
oklch(40.9% 0.161 259.4)
- #624400
#624400
oklch(40.9% 0.085 80)
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 #01439F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.034
- Cobalt #1E488F ΔE 0.035
- Twilight Blue #0A437A ΔE 0.062
- Light Navy #155084 ΔE 0.062
- Dusk Blue #26538D ΔE 0.062
- Blueberry #464196 ΔE 0.065
- Blue Blue #2242C7 ΔE 0.068
- Deep Sea Blue #015482 ΔE 0.072
Use #01439F 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.