#00405B
Closest named color: Midnight Green (#073B4C). oklch(35% 0.074 234.4), rgb(0, 64, 91).
Aa
White text reads best on this color (11.14:1).
About this color
#00405B is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.074 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.028 away. White text reads best on it, at 11.14:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.88:1 |
| White text | 11.14:1 |
Values
| HEX | #00405B |
| RGB | rgb(0, 64, 91) |
| HSL | hsl(198, 100%, 18%) |
| OKLCH | oklch(35% 0.074 234.4) |
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 #00405B | 11.14:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #00405B | 1.88:1 | Fails | Lc 8.6 | Not readable |
| #00405B text on white | 11.14:1 | AAA | Lc 95.3 | Preferred for body text |
| #00405B text on black | 1.88:1 | Fails | Lc -7.4 | 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
#C6DDEB
oklch(88.5% 0.031 234.5)
-
Step 300
300
#9EC7DF
oklch(80.8% 0.055 234)
-
Step 400
400
#66AAD0
oklch(70.8% 0.089 234.4)
-
Step 500
500
#3394C3
oklch(63.1% 0.113 234)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900 (this color)
#00405B
oklch(35% 0.074 234.4)
-
Step 950
950
#0A2A3A
oklch(27% 0.047 234.3)
#00405B 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) | #33405C | 0.045 |
| Deuteranopia (no green cones) | #27385B | 0.037 |
| Tritanopia (no blue cones) | #004749 | 0.045 |
| Achromatopsia (no color) | #3B3B3B | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00405B
#00405B
oklch(35% 0.074 234.4)
- #572F0F
#572F0F
oklch(35% 0.073 55.5)
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 #00405B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.039
- Charcoal #264653 ΔE 0.040
- Marine Blue #01386A ΔE 0.040
- Twilight Blue #0A437A ΔE 0.054
- Dark Teal #014D4E ΔE 0.055
Use #00405B 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.