#01577A
Closest named color: Deep Sea Blue (#015482). oklch(43.1% 0.09 234.5), rgb(1, 87, 122).
Aa
White text reads best on this color (7.93:1).
About this color
#01577A is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.090 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.018 away. White text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #01577A |
| RGB | rgb(1, 87, 122) |
| HSL | hsl(197, 98%, 24%) |
| OKLCH | oklch(43.1% 0.09 234.5) |
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 #01577A | 7.93:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #01577A | 2.64:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #01577A text on white | 7.93:1 | AAA | Lc 87.0 | Fine for body text |
| #01577A text on black | 2.64:1 | Fails | Lc -15.1 | 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 800.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#A0C7DE
oklch(80.9% 0.053 234.2)
-
Step 400
400
#69A9CE
oklch(70.6% 0.085 235.1)
-
Step 500
500
#3A93C1
oklch(63% 0.108 234.9)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800 (this color)
#01577A
oklch(43.1% 0.09 234.5)
-
Step 900
900
#114761
oklch(37.7% 0.07 234.5)
-
Step 950
950
#0C2A39
oklch(27% 0.045 233.7)
#01577A 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) | #46577C | 0.055 |
| Deuteranopia (no green cones) | #374D79 | 0.044 |
| Tritanopia (no blue cones) | #006063 | 0.055 |
| Achromatopsia (no color) | #515151 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01577A
#01577A
oklch(43.1% 0.09 234.5)
- #754118
#754118
oklch(43.1% 0.09 55.2)
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 #01577A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.018
- Light Navy #155084 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.038
- Dusk Blue #26538D ΔE 0.042
- Petrol #005F6A ΔE 0.042
- YInMn Blue #415A77 ΔE 0.050
- Deep Teal #00555A ΔE 0.054
- Peacock Blue #016795 ΔE 0.060
Use #01577A 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.