#1F4569
Closest named color: Dark Grey Blue (#29465B). oklch(38.1% 0.076 249.3), rgb(31, 69, 105).
Aa
White text reads best on this color (9.93:1).
About this color
#1F4569 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.076 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.027 away. White text reads best on it, at 9.93:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #1F4569 |
| RGB | rgb(31, 69, 105) |
| HSL | hsl(209, 54%, 27%) |
| OKLCH | oklch(38.1% 0.076 249.3) |
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 #1F4569 | 9.93:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #1F4569 | 2.11:1 | Fails | Lc 11.1 | Not readable |
| #1F4569 text on white | 9.93:1 | AAA | Lc 92.8 | Preferred for body text |
| #1F4569 text on black | 2.11:1 | Fails | Lc -9.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E4
oklch(80.8% 0.056 249.4)
-
Step 400
400
#74A5D7
oklch(70.7% 0.091 249.7)
-
Step 500
500
#4D8ECC
oklch(63.1% 0.115 249.1)
-
Step 600
600
#2E77B9
oklch(55.6% 0.125 249.3)
-
Step 700
700
#2064A0
oklch(49.2% 0.117 249.4)
-
Step 800
800
#1D5281
oklch(42.8% 0.096 248.9)
-
Step 900
900 (this color)
#1F4569
oklch(38.1% 0.076 249.3)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#1F4569 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) | #35476B | 0.027 |
| Deuteranopia (no green cones) | #2B4068 | 0.018 |
| Tritanopia (no blue cones) | #004D52 | 0.057 |
| Achromatopsia (no color) | #434343 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4569
#1F4569
oklch(38.1% 0.076 249.3)
- #5C3A0C
#5C3A0C
oklch(38% 0.075 68.9)
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 #1F4569, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.027
- Twilight Blue #0A437A ΔE 0.033
- Charcoal #264653 ΔE 0.040
- Marine Blue #01386A ΔE 0.049
- Light Navy #155084 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.055
Use #1F4569 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.