#174257
Closest named color: Charcoal (#264653). oklch(35.9% 0.059 233.1), rgb(23, 66, 87).
Aa
White text reads best on this color (10.75:1).
About this color
#174257 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.059 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.023 away. White text reads best on it, at 10.75:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #174257 |
| RGB | rgb(23, 66, 87) |
| HSL | hsl(200, 58%, 22%) |
| OKLCH | oklch(35.9% 0.059 233.1) |
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 #174257 | 10.75:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #174257 | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #174257 text on white | 10.75:1 | AAA | Lc 94.7 | Preferred for body text |
| #174257 text on black | 1.95:1 | Fails | Lc -7.9 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A5C6D9
oklch(80.9% 0.044 233.3)
-
Step 400
400
#73A9C6
oklch(70.8% 0.071 232.6)
-
Step 500
500
#4B93B8
oklch(63.2% 0.091 233.1)
-
Step 600
600
#297CA4
oklch(55.5% 0.099 233.9)
-
Step 700
700
#1A698C
oklch(49.2% 0.091 232.8)
-
Step 800
800
#195672
oklch(42.8% 0.076 232.7)
-
Step 900
900 (this color)
#174257
oklch(35.9% 0.059 233.1)
-
Step 950
950
#122A36
oklch(27.2% 0.037 232.2)
#174257 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) | #384158 | 0.039 |
| Deuteranopia (no green cones) | #2F3B57 | 0.033 |
| Tritanopia (no blue cones) | #004849 | 0.039 |
| Achromatopsia (no color) | #3E3E3E | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174257
#174257
oklch(35.9% 0.059 233.1)
- #55341E
#55341E
oklch(36% 0.059 53.5)
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 #174257, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.023
- Dark Grey Blue #29465B ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.025
- Midnight Green #073B4C ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.042
- Dark Teal #014D4E ΔE 0.045
- Onyx #343A40 ΔE 0.049
- Marine Blue #01386A ΔE 0.054
Use #174257 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.