#005B81
Closest named color: Deep Sea Blue (#015482). oklch(44.5% 0.095 235.6), rgb(0, 91, 129).
Aa
White text reads best on this color (7.46:1).
About this color
#005B81 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.095 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.022 away. White text reads best on it, at 7.46:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #005B81 |
| RGB | rgb(0, 91, 129) |
| HSL | hsl(198, 100%, 25%) |
| OKLCH | oklch(44.5% 0.095 235.6) |
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 #005B81 | 7.46:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #005B81 | 2.81:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #005B81 text on white | 7.46:1 | AAA | Lc 85.4 | Fine for body text |
| #005B81 text on black | 2.81:1 | Fails | Lc -16.6 | 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
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#9FC7E0
oklch(80.9% 0.055 235.8)
-
Step 400
400
#67AAD1
oklch(70.8% 0.089 235.5)
-
Step 500
500
#3593C4
oklch(63% 0.113 235.7)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800 (this color)
#005B81
oklch(44.5% 0.095 235.6)
-
Step 900
900
#0C4763
oklch(37.7% 0.074 235.3)
-
Step 950
950
#0B2A3A
oklch(27.1% 0.047 234.9)
#005B81 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) | #485B83 | 0.056 |
| Deuteranopia (no green cones) | #385080 | 0.045 |
| Tritanopia (no blue cones) | #006568 | 0.060 |
| Achromatopsia (no color) | #555555 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #005B81
#005B81
oklch(44.5% 0.095 235.6)
- #7B4417
#7B4417
oklch(44.6% 0.095 55.7)
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 #005B81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.029
- Light Navy #155084 ΔE 0.035
- Dusk Blue #26538D ΔE 0.038
- Petrol #005F6A ΔE 0.044
- Peacock Blue #016795 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.050
Use #005B81 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.