#01779F
Closest named color: Sea Blue (#047495). oklch(53.4% 0.107 230.7), rgb(1, 119, 159).
Aa
White text reads best on this color (5.07:1).
About this color
#01779F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.107 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.017 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #01779F |
| RGB | rgb(1, 119, 159) |
| HSL | hsl(195, 99%, 31%) |
| OKLCH | oklch(53.4% 0.107 230.7) |
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 #01779F | 5.07:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #01779F | 4.14:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #01779F text on white | 5.07:1 | AA | Lc 74.4 | Content text, not long reading |
| #01779F text on black | 4.14:1 | AA large text | Lc -27.3 | Dividers and decoration only |
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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DA
oklch(80.9% 0.048 230.4)
-
Step 400
400
#6DAAC8
oklch(70.8% 0.077 230.6)
-
Step 500
500
#4094BA
oklch(63.1% 0.099 230.8)
-
Step 600
600 (this color)
#01779F
oklch(53.4% 0.107 230.7)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#095674
oklch(42.6% 0.083 231.7)
-
Step 900
900
#15475D
oklch(37.6% 0.064 231.2)
-
Step 950
950
#0E2A37
oklch(27% 0.041 231.2)
#01779F 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) | #6275A1 | 0.071 |
| Deuteranopia (no green cones) | #50699E | 0.060 |
| Tritanopia (no blue cones) | #008285 | 0.061 |
| Achromatopsia (no color) | #6E6E6E | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01779F
#01779F
oklch(53.4% 0.107 230.7)
- #9D582D
#9D582D
oklch(53.3% 0.107 50.5)
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 #01779F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.017
- Ocean Blue #03719C ΔE 0.018
- Ocean #017B92 ΔE 0.027
- Nice Blue #107AB0 ΔE 0.028
- Muted Blue #3B719F ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.035
- Dull Blue #49759C ΔE 0.040
- Cerulean #457B9D ΔE 0.041
Use #01779F 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.