#05599D
Closest named color: Dusk Blue (#26538D). oklch(45.9% 0.131 251), rgb(5, 89, 157).
Aa
White text reads best on this color (7.18:1).
About this color
#05599D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.131 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.92:1 |
| White text | 7.18:1 |
Values
| HEX | #05599D |
| RGB | rgb(5, 89, 157) |
| HSL | hsl(207, 94%, 32%) |
| OKLCH | oklch(45.9% 0.131 251) |
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 #05599D | 7.18:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #05599D | 2.92:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #05599D text on white | 7.18:1 | AAA | Lc 84.3 | Fine for body text |
| #05599D text on black | 2.92:1 | Fails | Lc -17.6 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9CC5F1
oklch(81% 0.076 250.6)
-
Step 400
400
#63A5EA
oklch(70.7% 0.122 250.9)
-
Step 500
500
#318CE4
oklch(63% 0.157 251.3)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800 (this color)
#05599D
oklch(45.9% 0.131 251)
-
Step 900
900
#0A4375
oklch(37.7% 0.102 250.8)
-
Step 950
950
#0A2845
oklch(27.2% 0.064 250.9)
#05599D 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) | #365EA0 | 0.037 |
| Deuteranopia (no green cones) | #19529C | 0.020 |
| Tritanopia (no blue cones) | #006973 | 0.094 |
| Achromatopsia (no color) | #575757 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05599D
#05599D
oklch(45.9% 0.131 251)
- #7A4C00
#7A4C00
oklch(45.8% 0.099 70.2)
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 #05599D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.041
- Light Navy #155084 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.045
- Peacock Blue #016795 ΔE 0.046
- Cobalt #1E488F ΔE 0.049
- Dusky Blue #475F94 ΔE 0.058
Use #05599D 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.