#005B9D
Closest named color: Dusk Blue (#26538D). oklch(46.3% 0.129 249.4), rgb(0, 91, 157).
Aa
White text reads best on this color (7.03:1).
About this color
#005B9D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.129 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.033 away. White text reads best on it, at 7.03:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #005B9D |
| RGB | rgb(0, 91, 157) |
| HSL | hsl(205, 100%, 31%) |
| OKLCH | oklch(46.3% 0.129 249.4) |
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 #005B9D | 7.03:1 | AAA | Lc -88.7 | Fine for body text |
| Black text on #005B9D | 2.98:1 | Fails | Lc 20.3 | Dividers and decoration only |
| #005B9D text on white | 7.03:1 | AAA | Lc 83.7 | Fine for body text |
| #005B9D text on black | 2.98:1 | Fails | Lc -18.2 | 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 700.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A2C5E8
oklch(81% 0.062 248.6)
-
Step 400
400
#6EA5DD
oklch(70.6% 0.101 249.9)
-
Step 500
500
#458ED3
oklch(63.1% 0.127 249.4)
-
Step 600
600
#2177C0
oklch(55.7% 0.138 249.2)
-
Step 700
700 (this color)
#005B9D
oklch(46.3% 0.129 249.4)
-
Step 800
800
#135186
oklch(42.6% 0.107 249.5)
-
Step 900
900
#18446C
oklch(37.8% 0.084 249.3)
-
Step 950
950
#10283F
oklch(27% 0.053 249.5)
#005B9D 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) | #3960A0 | 0.040 |
| Deuteranopia (no green cones) | #1E539C | 0.023 |
| Tritanopia (no blue cones) | #006B74 | 0.093 |
| Achromatopsia (no color) | #595959 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #005B9D
#005B9D
oklch(46.3% 0.129 249.4)
- #7C4D00
#7C4D00
oklch(46.3% 0.1 69.8)
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 #005B9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.040
- Peacock Blue #016795 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.046
- Light Navy #155084 ΔE 0.047
- Cobalt #1E488F ΔE 0.055
- Denim #3B638C ΔE 0.055
Use #005B9D 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.