#01557F
Closest named color: Deep Sea Blue (#015482). oklch(42.9% 0.098 239.9), rgb(1, 85, 127).
Aa
White text reads best on this color (8.05:1).
About this color
#01557F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.098 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.006 away. White text reads best on it, at 8.05:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #01557F |
| RGB | rgb(1, 85, 127) |
| HSL | hsl(200, 98%, 25%) |
| OKLCH | oklch(42.9% 0.098 239.9) |
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 #01557F | 8.05:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #01557F | 2.60:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #01557F text on white | 8.05:1 | AAA | Lc 87.3 | Fine for body text |
| #01557F text on black | 2.60:1 | Fails | Lc -14.8 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DCEC
oklch(88.4% 0.032 240.7)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#69A8D4
oklch(70.6% 0.092 240.3)
-
Step 500
500
#3A92C9
oklch(63.2% 0.117 240)
-
Step 600
600
#027BB5
oklch(55.6% 0.127 239.9)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800 (this color)
#01557F
oklch(42.9% 0.098 239.9)
-
Step 900
900
#114666
oklch(37.7% 0.077 240.5)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#01557F 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) | #415681 | 0.050 |
| Deuteranopia (no green cones) | #304B7E | 0.038 |
| Tritanopia (no blue cones) | #006064 | 0.065 |
| Achromatopsia (no color) | #505050 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01557F
#01557F
oklch(42.9% 0.098 239.9)
- #754005
#754005
oklch(42.8% 0.098 60)
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 #01557F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.006
- Light Navy #155084 ΔE 0.020
- Dusk Blue #26538D ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.036
- Cobalt #1E488F ΔE 0.051
- Petrol #005F6A ΔE 0.054
- Twilight Blue #0A437A ΔE 0.054
- YInMn Blue #415A77 ΔE 0.054
Use #01557F 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.