#003E5E
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.079 239.6), rgb(0, 62, 94).
Aa
White text reads best on this color (11.34:1).
About this color
#003E5E is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.079 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.031 away. White text reads best on it, at 11.34:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #003E5E |
| RGB | rgb(0, 62, 94) |
| HSL | hsl(200, 100%, 18%) |
| OKLCH | oklch(34.7% 0.079 239.6) |
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 #003E5E | 11.34:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #003E5E | 1.85:1 | Fails | Lc 8.2 | Not readable |
| #003E5E text on white | 11.34:1 | AAA | Lc 95.7 | Preferred for body text |
| #003E5E text on black | 1.85:1 | 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
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDED
oklch(88.5% 0.033 238.2)
-
Step 300
300
#9EC7E3
oklch(81% 0.059 238.3)
-
Step 400
400
#66A9D6
oklch(70.8% 0.095 239.4)
-
Step 500
500
#3492CB
oklch(63.1% 0.122 239.8)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900 (this color)
#003E5E
oklch(34.7% 0.079 239.6)
-
Step 950
950
#0B293C
oklch(26.9% 0.05 240.3)
#003E5E 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) | #2E3F5F | 0.040 |
| Deuteranopia (no green cones) | #22375D | 0.030 |
| Tritanopia (no blue cones) | #004649 | 0.052 |
| Achromatopsia (no color) | #3A3A3A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003E5E
#003E5E
oklch(34.7% 0.079 239.6)
- #572E03
#572E03
oklch(34.7% 0.079 59.7)
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 #003E5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.031
- Midnight Green #073B4C ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.045
- Charcoal #264653 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.050
- Marine #042E60 ΔE 0.051
Use #003E5E 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.