#1F4E5E
Closest named color: Dark Grey Blue (#29465B). oklch(39.9% 0.057 223.5), rgb(31, 78, 94).
Aa
White text reads best on this color (9.09:1).
About this color
#1F4E5E is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.057 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 9.09:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.30:1 |
| White text | 9.09:1 |
Values
| HEX | #1F4E5E |
| RGB | rgb(31, 78, 94) |
| HSL | hsl(195, 50%, 25%) |
| OKLCH | oklch(39.9% 0.057 223.5) |
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 #1F4E5E | 9.09:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #1F4E5E | 2.30:1 | Fails | Lc 13.2 | Not readable |
| #1F4E5E text on white | 9.09:1 | AAA | Lc 90.7 | Preferred for body text |
| #1F4E5E text on black | 2.30:1 | Fails | Lc -11.6 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A4C7D5
oklch(80.9% 0.042 224.1)
-
Step 400
400
#70AAC0
oklch(70.6% 0.068 223.9)
-
Step 500
500
#4595B0
oklch(63.1% 0.088 223)
-
Step 600
600
#1E7F9C
oklch(55.6% 0.095 223.2)
-
Step 700
700
#0C6B85
oklch(49.1% 0.088 223.1)
-
Step 800
800
#11576C
oklch(42.6% 0.073 223.4)
-
Step 900
900 (this color)
#1F4E5E
oklch(39.9% 0.057 223.5)
-
Step 950
950
#102A33
oklch(26.9% 0.036 223.3)
#1F4E5E 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) | #454C5F | 0.046 |
| Deuteranopia (no green cones) | #3C465E | 0.039 |
| Tritanopia (no blue cones) | #005353 | 0.033 |
| Achromatopsia (no color) | #484848 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4E5E
#1F4E5E
oklch(39.9% 0.057 223.5)
- #613D2E
#613D2E
oklch(39.8% 0.057 43.3)
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 #1F4E5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.027
- Deep Teal #00555A ΔE 0.029
- Dark Slate Gray #2F4F4F ΔE 0.030
- Dark Teal #014D4E ΔE 0.034
- Dark Blue Green #005249 ΔE 0.047
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.058
Use #1F4E5E 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.