#31384E
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.4% 0.04 270.6), rgb(49, 56, 78).
Aa
White text reads best on this color (11.62:1).
About this color
#31384E is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.040 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.025 away. White text reads best on it, at 11.62:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.80:1 |
| White text | 11.62:1 |
Values
| HEX | #31384E |
| RGB | rgb(49, 56, 78) |
| HSL | hsl(226, 23%, 25%) |
| OKLCH | oklch(34.4% 0.04 270.6) |
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 #31384E | 11.62:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #31384E | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #31384E text on white | 11.62:1 | AAA | Lc 96.7 | Preferred for body text |
| #31384E text on black | 1.80:1 | Fails | Lc 0.0 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D5
oklch(80.9% 0.031 271)
-
Step 400
400
#95A0BF
oklch(70.8% 0.047 269.8)
-
Step 500
500
#7B88AF
oklch(63.1% 0.061 270.3)
-
Step 600
600
#64719B
oklch(55.5% 0.067 270.8)
-
Step 700
700
#535F84
oklch(49.1% 0.061 270.2)
-
Step 800
800
#444E6B
oklch(42.7% 0.05 269.5)
-
Step 900
900 (this color)
#31384E
oklch(34.4% 0.04 270.6)
-
Step 950
950
#222633
oklch(27.1% 0.025 271.4)
#31384E 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) | #313A4F | 0.006 |
| Deuteranopia (no green cones) | #2F374D | 0.005 |
| Tritanopia (no blue cones) | #293C40 | 0.034 |
| Achromatopsia (no color) | #393939 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31384E
#31384E
oklch(34.4% 0.04 270.6)
- #413820
#413820
oklch(34.4% 0.04 89.6)
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 #31384E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.025
- Onyx #343A40 ΔE 0.028
- Gunmetal #293241 ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.040
- Midnight Green #073B4C ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal #264653 ΔE 0.045
Use #31384E 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.