#1F4567
Closest named color: Dark Grey Blue (#29465B). oklch(38% 0.073 248), rgb(31, 69, 103).
Aa
White text reads best on this color (9.97:1).
About this color
#1F4567 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.073 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.024 away. White text reads best on it, at 9.97:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #1F4567 |
| RGB | rgb(31, 69, 103) |
| HSL | hsl(208, 54%, 26%) |
| OKLCH | oklch(38% 0.073 248) |
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 #1F4567 | 9.97:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #1F4567 | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #1F4567 text on white | 9.97:1 | AAA | Lc 92.9 | Preferred for body text |
| #1F4567 text on black | 2.10:1 | Fails | Lc -9.5 | 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
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C4E3
oklch(80.8% 0.055 248.5)
-
Step 400
400
#74A6D5
oklch(70.8% 0.087 247.6)
-
Step 500
500
#4E8ECA
oklch(63% 0.112 248.6)
-
Step 600
600
#2E78B6
oklch(55.7% 0.121 247.5)
-
Step 700
700
#20649D
oklch(49% 0.113 248.2)
-
Step 800
800
#1D527F
oklch(42.7% 0.093 247.8)
-
Step 900
900 (this color)
#1F4567
oklch(38% 0.073 248)
-
Step 950
950
#13283C
oklch(27% 0.046 248.8)
#1F4567 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) | #364668 | 0.028 |
| Deuteranopia (no green cones) | #2C3F66 | 0.021 |
| Tritanopia (no blue cones) | #004D51 | 0.056 |
| Achromatopsia (no color) | #424242 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4567
#1F4567
oklch(38% 0.073 248)
- #5B3A10
#5B3A10
oklch(37.9% 0.072 68.3)
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 #1F4567, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.024
- Charcoal #264653 ΔE 0.036
- Twilight Blue #0A437A ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.050
- Marine Blue #01386A ΔE 0.050
- Light Navy #155084 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.057
Use #1F4567 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.