#374759
Closest named color: Dark Grey Blue (#29465B). oklch(39.2% 0.037 251.7), rgb(55, 71, 89).
Aa
White text reads best on this color (9.51:1).
About this color
#374759 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.037 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.019 away. White text reads best on it, at 9.51:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.20:1 |
| White text | 9.51:1 |
Values
| HEX | #374759 |
| RGB | rgb(55, 71, 89) |
| HSL | hsl(212, 24%, 28%) |
| OKLCH | oklch(39.2% 0.037 251.7) |
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 #374759 | 9.51:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #374759 | 2.20:1 | Fails | Lc 12.0 | Not readable |
| #374759 text on white | 9.51:1 | AAA | Lc 92.0 | Preferred for body text |
| #374759 text on black | 2.20:1 | Fails | Lc -10.4 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B4C2D2
oklch(80.8% 0.027 251.7)
-
Step 400
400
#8DA3BC
oklch(70.7% 0.044 251.8)
-
Step 500
500
#718CAB
oklch(63.1% 0.056 252.2)
-
Step 600
600
#597697
oklch(55.6% 0.062 252.1)
-
Step 700
700
#496381
oklch(49.1% 0.058 252.5)
-
Step 800
800
#3C5168
oklch(42.7% 0.046 251.2)
-
Step 900
900 (this color)
#374759
oklch(39.2% 0.037 251.7)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#374759 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) | #40475A | 0.013 |
| Deuteranopia (no green cones) | #3C4459 | 0.011 |
| Tritanopia (no blue cones) | #2C4B4D | 0.032 |
| Achromatopsia (no color) | #464646 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374759
#374759
oklch(39.2% 0.037 251.7)
- #52422F
#52422F
oklch(39.1% 0.037 71.2)
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 #374759, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.019
- Charcoal #264653 ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.038
- Onyx #343A40 ΔE 0.052
- Dark Teal #014D4E ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.055
- Deep Teal #00555A ΔE 0.057
Use #374759 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.