#1F4E6E
Closest named color: Deep Sea Blue (#015482). oklch(40.7% 0.074 241.7), rgb(31, 78, 110).
Aa
White text reads best on this color (8.84:1).
About this color
#1F4E6E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.074 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.035 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #1F4E6E |
| RGB | rgb(31, 78, 110) |
| HSL | hsl(204, 56%, 28%) |
| OKLCH | oklch(40.7% 0.074 241.7) |
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 #1F4E6E | 8.84:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #1F4E6E | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #1F4E6E text on white | 8.84:1 | AAA | Lc 90.0 | Preferred for body text |
| #1F4E6E text on black | 2.37:1 | Fails | Lc -12.2 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A9C5DB
oklch(81% 0.043 241.8)
-
Step 400
400
#7AA6C8
oklch(70.6% 0.069 242.1)
-
Step 500
500
#5690BA
oklch(63.1% 0.088 241.5)
-
Step 600
600
#397AA6
oklch(55.7% 0.095 241)
-
Step 700
700
#2B668F
oklch(49.1% 0.09 242.2)
-
Step 800
800 (this color)
#1F4E6E
oklch(40.7% 0.074 241.7)
-
Step 900
900
#23455E
oklch(37.7% 0.059 242.4)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#1F4E6E 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) | #3F4E6F | 0.036 |
| Deuteranopia (no green cones) | #35476D | 0.029 |
| Tritanopia (no blue cones) | #005659 | 0.053 |
| Achromatopsia (no color) | #4A4A4A | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4E6E
#1F4E6E
oklch(40.7% 0.074 241.7)
- #663F1B
#663F1B
oklch(40.6% 0.074 60.8)
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 #1F4E6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.035
- Light Navy #155084 ΔE 0.036
- Charcoal #264653 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.047
- Deep Teal #00555A ΔE 0.049
- Dusk Blue #26538D ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.055
Use #1F4E6E 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.