#00599C
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.13 250.2), rgb(0, 89, 156).
Aa
White text reads best on this color (7.21:1).
About this color
#00599C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.130 and its hue 250°. 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 7.21:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.90:1 |
| White text | 7.21:1 |
Values
| HEX | #00599C |
| RGB | rgb(0, 89, 156) |
| HSL | hsl(206, 100%, 31%) |
| OKLCH | oklch(45.7% 0.13 250.2) |
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 #00599C | 7.21:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #00599C | 2.90:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #00599C text on white | 7.21:1 | AAA | Lc 84.4 | Fine for body text |
| #00599C text on black | 2.90:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9CC5F1
oklch(81% 0.076 250.6)
-
Step 400
400
#62A5E9
oklch(70.6% 0.122 250.2)
-
Step 500
500
#2E8DE3
oklch(63.1% 0.156 250.2)
-
Step 600
600
#0075CB
oklch(55.5% 0.159 250.4)
-
Step 700
700
#0063AC
oklch(49.2% 0.139 250)
-
Step 800
800 (this color)
#00599C
oklch(45.7% 0.13 250.2)
-
Step 900
900
#084375
oklch(37.7% 0.102 250.5)
-
Step 950
950
#092844
oklch(27.1% 0.063 249.6)
#00599C 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) | #365E9F | 0.038 |
| Deuteranopia (no green cones) | #1A519B | 0.023 |
| Tritanopia (no blue cones) | #006973 | 0.093 |
| Achromatopsia (no color) | #575757 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00599C
#00599C
oklch(45.7% 0.13 250.2)
- #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 #00599C, 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 0.040
- Denim Blue #3B5B92 ΔE 0.042
- Light Navy #155084 ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.043
- Peacock Blue #016795 ΔE 0.045
- Cobalt #1E488F ΔE 0.049
- Dusky Blue #475F94 ΔE 0.059
Use #00599C 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.