#063F5B
Closest named color: Midnight Green (#073B4C). oklch(34.9% 0.073 237.1), rgb(6, 63, 91).
Aa
White text reads best on this color (11.23:1).
About this color
#063F5B is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.073 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.027 away. White text reads best on it, at 11.23:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.86:1 |
| White text | 11.23:1 |
Values
| HEX | #063F5B |
| RGB | rgb(6, 63, 91) |
| HSL | hsl(200, 88%, 19%) |
| OKLCH | oklch(34.9% 0.073 237.1) |
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 #063F5B | 11.23:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #063F5B | 1.86:1 | Fails | Lc 8.4 | Not readable |
| #063F5B text on white | 11.23:1 | AAA | Lc 95.5 | Preferred for body text |
| #063F5B text on black | 1.86:1 | Fails | Lc 0.0 | 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#A0C7E0
oklch(81% 0.055 236.5)
-
Step 400
400
#6AA9D0
oklch(70.7% 0.087 236.9)
-
Step 500
500
#3B93C4
oklch(63.2% 0.111 236.8)
-
Step 600
600
#037CB1
oklch(55.6% 0.121 237.3)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#01557B
oklch(42.6% 0.093 237.3)
-
Step 900
900 (this color)
#063F5B
oklch(34.9% 0.073 237.1)
-
Step 950
950
#0D2A3A
oklch(27.1% 0.045 236.1)
#063F5B 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) | #313F5C | 0.040 |
| Deuteranopia (no green cones) | #26385B | 0.032 |
| Tritanopia (no blue cones) | #004649 | 0.045 |
| Achromatopsia (no color) | #3B3B3B | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063F5B
#063F5B
oklch(34.9% 0.073 237.1)
- #562F0E
#562F0E
oklch(34.9% 0.073 56.8)
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 #063F5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.033
- Marine Blue #01386A ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.039
- Charcoal #264653 ΔE 0.040
- Twilight Blue #0A437A ΔE 0.054
- Marine #042E60 ΔE 0.057
Use #063F5B 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.