#1F445A
Closest named color: Dark Grey Blue (#29465B). oklch(37% 0.057 237.1), rgb(31, 68, 90).
Aa
White text reads best on this color (10.33:1).
About this color
#1F445A is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.057 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.013 away. White text reads best on it, at 10.33:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #1F445A |
| RGB | rgb(31, 68, 90) |
| HSL | hsl(202, 49%, 24%) |
| OKLCH | oklch(37% 0.057 237.1) |
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 #1F445A | 10.33:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #1F445A | 2.03:1 | Fails | Lc 10.1 | Not readable |
| #1F445A text on white | 10.33:1 | AAA | Lc 93.8 | Preferred for body text |
| #1F445A text on black | 2.03:1 | Fails | Lc -8.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A8C5D9
oklch(80.8% 0.042 238.2)
-
Step 400
400
#78A7C6
oklch(70.6% 0.068 237.9)
-
Step 500
500
#5291B8
oklch(63% 0.088 237.5)
-
Step 600
600
#347BA4
oklch(55.6% 0.095 237.3)
-
Step 700
700
#26678C
oklch(49% 0.088 237.6)
-
Step 800
800
#215472
oklch(42.6% 0.073 237.9)
-
Step 900
900 (this color)
#1F445A
oklch(37% 0.057 237.1)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#1F445A 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) | #3A445B | 0.034 |
| Deuteranopia (no green cones) | #323E5A | 0.028 |
| Tritanopia (no blue cones) | #004A4B | 0.042 |
| Achromatopsia (no color) | #404040 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F445A
#1F445A
oklch(37% 0.057 237.1)
- #563820
#563820
oklch(37% 0.056 58.5)
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 #1F445A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.013
- Charcoal #264653 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.033
- Midnight Green #073B4C ΔE 0.042
- Dark Teal #014D4E ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.050
- Onyx #343A40 ΔE 0.050
Use #1F445A 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.