#23455E
Closest named color: Dark Grey Blue (#29465B). oklch(37.7% 0.059 242.4), rgb(35, 69, 94).
Aa
White text reads best on this color (10.07:1).
About this color
#23455E is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.059 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.009 away. White text reads best on it, at 10.07:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #23455E |
| RGB | rgb(35, 69, 94) |
| HSL | hsl(205, 46%, 25%) |
| OKLCH | oklch(37.7% 0.059 242.4) |
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 #23455E | 10.07:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #23455E | 2.08:1 | Fails | Lc 10.7 | Not readable |
| #23455E text on white | 10.07:1 | AAA | Lc 93.2 | Preferred for body text |
| #23455E text on black | 2.08:1 | Fails | Lc -9.2 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C5DB
oklch(81% 0.043 241.8)
-
Step 400
400
#7AA6C9
oklch(70.6% 0.07 242.9)
-
Step 500
500
#5690BB
oklch(63.1% 0.089 242.1)
-
Step 600
600
#3979A8
oklch(55.5% 0.098 243.1)
-
Step 700
700
#2A6690
oklch(49.1% 0.091 242.5)
-
Step 800
800
#255375
oklch(42.6% 0.076 243.3)
-
Step 900
900 (this color)
#23455E
oklch(37.7% 0.059 242.4)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#23455E 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) | #3A455F | 0.029 |
| Deuteranopia (no green cones) | #323F5E | 0.025 |
| Tritanopia (no blue cones) | #004B4E | 0.045 |
| Achromatopsia (no color) | #424242 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23455E
#23455E
oklch(37.7% 0.059 242.4)
- #583A1F
#583A1F
oklch(37.7% 0.059 61.5)
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 #23455E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.009
- Charcoal #264653 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.040
- Dark Teal #014D4E ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.050
- Midnight Green #073B4C ΔE 0.050
- Twilight Blue #0A437A ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.052
Use #23455E 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.