#00579E
Closest named color: Dusk Blue (#26538D). oklch(45.4% 0.135 251.8), rgb(0, 87, 158).
Aa
White text reads best on this color (7.35:1).
About this color
#00579E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.135 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.031 away. White text reads best on it, at 7.35:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.85:1 |
| White text | 7.35:1 |
Values
| HEX | #00579E |
| RGB | rgb(0, 87, 158) |
| HSL | hsl(207, 100%, 31%) |
| OKLCH | oklch(45.4% 0.135 251.8) |
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 #00579E | 7.35:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #00579E | 2.85:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #00579E text on white | 7.35:1 | AAA | Lc 84.9 | Fine for body text |
| #00579E text on black | 2.85:1 | Fails | Lc -17.1 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9CC5F3
oklch(81% 0.079 251.7)
-
Step 400
400
#62A5ED
oklch(70.8% 0.126 251.6)
-
Step 500
500
#2F8CE7
oklch(63.1% 0.161 251.7)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800 (this color)
#00579E
oklch(45.4% 0.135 251.8)
-
Step 900
900
#094277
oklch(37.6% 0.106 252.2)
-
Step 950
950
#092746
oklch(26.9% 0.068 252.4)
#00579E 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) | #315DA1 | 0.036 |
| Deuteranopia (no green cones) | #0D509D | 0.019 |
| Tritanopia (no blue cones) | #006872 | 0.099 |
| Achromatopsia (no color) | #565656 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00579E
#00579E
oklch(45.4% 0.135 251.8)
- #774C00
#774C00
oklch(45.4% 0.097 72.2)
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 #00579E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.031
- Light Navy #155084 ΔE 0.044
- Cobalt #1E488F ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.046
- Peacock Blue #016795 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.063
Use #00579E 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.