#015597
Closest named color: Dusk Blue (#26538D). oklch(44.4% 0.128 250.8), rgb(1, 85, 151).
Aa
White text reads best on this color (7.64:1).
About this color
#015597 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.128 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.023 away. White text reads best on it, at 7.64:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #015597 |
| RGB | rgb(1, 85, 151) |
| HSL | hsl(206, 99%, 30%) |
| OKLCH | oklch(44.4% 0.128 250.8) |
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 #015597 | 7.64:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #015597 | 2.74:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #015597 text on white | 7.64:1 | AAA | Lc 85.9 | Fine for body text |
| #015597 text on black | 2.74:1 | Fails | Lc -16.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9DC5F0
oklch(81% 0.075 250.6)
-
Step 400
400
#64A5E8
oklch(70.6% 0.119 250.5)
-
Step 500
500
#338DE2
oklch(63.2% 0.153 250.7)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800 (this color)
#015597
oklch(44.4% 0.128 250.8)
-
Step 900
900
#0C4374
oklch(37.7% 0.1 250.8)
-
Step 950
950
#0A2844
oklch(27.1% 0.063 250.1)
#015597 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) | #325A9A | 0.036 |
| Deuteranopia (no green cones) | #154E96 | 0.020 |
| Tritanopia (no blue cones) | #00656E | 0.093 |
| Achromatopsia (no color) | #535353 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #015597
#015597
oklch(44.4% 0.128 250.8)
- #744900
#744900
oklch(44.4% 0.096 71.2)
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 #015597, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.023
- Light Navy #155084 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.035
- Cobalt #1E488F ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.046
- Peacock Blue #016795 ΔE 0.055
- Denim #3B638C ΔE 0.065
Use #015597 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.