#1F445C
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.059 239.5), rgb(31, 68, 92).
Aa
White text reads best on this color (10.29:1).
About this color
#1F445C is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.059 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.014 away. White text reads best on it, at 10.29:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #1F445C |
| RGB | rgb(31, 68, 92) |
| HSL | hsl(204, 50%, 24%) |
| OKLCH | oklch(37.1% 0.059 239.5) |
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 #1F445C | 10.29:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #1F445C | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #1F445C text on white | 10.29:1 | AAA | Lc 93.7 | Preferred for body text |
| #1F445C text on black | 2.03:1 | Fails | Lc -8.8 | 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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A7C5DB
oklch(80.8% 0.045 239.9)
-
Step 400
400
#77A7C9
oklch(70.7% 0.072 239.9)
-
Step 500
500
#5291BB
oklch(63.2% 0.091 239.6)
-
Step 600
600
#337AA7
oklch(55.5% 0.099 239.9)
-
Step 700
700
#25678F
oklch(49.1% 0.092 239.4)
-
Step 800
800
#215474
oklch(42.7% 0.076 239.6)
-
Step 900
900 (this color)
#1F445C
oklch(37.1% 0.059 239.5)
-
Step 950
950
#142937
oklch(27% 0.038 239.4)
#1F445C 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) | #39445D | 0.032 |
| Deuteranopia (no green cones) | #313E5C | 0.027 |
| Tritanopia (no blue cones) | #004A4C | 0.044 |
| Achromatopsia (no color) | #404040 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F445C
#1F445C
oklch(37.1% 0.059 239.5)
- #57381E
#57381E
oklch(37.1% 0.059 59.5)
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 #1F445C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.014
- Charcoal #264653 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.035
- Midnight Green #073B4C ΔE 0.044
- Dark Teal #014D4E ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.052
- Onyx #343A40 ΔE 0.053
Use #1F445C 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.