#00405A
Closest named color: Midnight Green (#073B4C). oklch(35% 0.073 233.4), rgb(0, 64, 90).
Aa
White text reads best on this color (11.16:1).
About this color
#00405A is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.073 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.026 away. White text reads best on it, at 11.16:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #00405A |
| RGB | rgb(0, 64, 90) |
| HSL | hsl(197, 100%, 18%) |
| OKLCH | oklch(35% 0.073 233.4) |
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 #00405A | 11.16:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #00405A | 1.88:1 | Fails | Lc 8.6 | Not readable |
| #00405A text on white | 11.16:1 | AAA | Lc 95.3 | Preferred for body text |
| #00405A text on black | 1.88:1 | Fails | Lc -7.3 | Not readable |
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 900.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEA
oklch(88.4% 0.03 232.5)
-
Step 300
300
#9EC7DF
oklch(80.8% 0.055 234)
-
Step 400
400
#66AACE
oklch(70.7% 0.087 233)
-
Step 500
500
#3494C2
oklch(63.1% 0.111 233.5)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900 (this color)
#00405A
oklch(35% 0.073 233.4)
-
Step 950
950
#0B2A39
oklch(27% 0.045 233.1)
#00405A 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) | #333F5B | 0.045 |
| Deuteranopia (no green cones) | #28385A | 0.038 |
| Tritanopia (no blue cones) | #004749 | 0.044 |
| Achromatopsia (no color) | #3B3B3B | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00405A
#00405A
oklch(35% 0.073 233.4)
- #572E11
#572E11
oklch(34.9% 0.073 52.8)
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 #00405A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.037
- Charcoal #264653 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.039
- Marine Blue #01386A ΔE 0.042
- Dark Teal #014D4E ΔE 0.054
- Twilight Blue #0A437A ΔE 0.056
Use #00405A 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.