#437A97
Closest named color: Cerulean (#457B9D). oklch(55.4% 0.074 233.3), rgb(67, 122, 151).
Aa
White text reads best on this color (4.69:1).
About this color
#437A97 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.074 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.010 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.46:1 |
| White text | 4.69:1 |
Values
| HEX | #437A97 |
| RGB | rgb(67, 122, 151) |
| HSL | hsl(201, 39%, 43%) |
| OKLCH | oklch(55.4% 0.074 233.3) |
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 #437A97 | 4.69:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #437A97 | 4.46:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #437A97 text on white | 4.69:1 | AA | Lc 72.5 | Content text, not long reading |
| #437A97 text on black | 4.46:1 | AA large text | Lc -29.2 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ACC5D3
oklch(80.9% 0.034 232.3)
-
Step 400
400
#80A7BD
oklch(70.8% 0.053 233.2)
-
Step 500
500
#5F91AC
oklch(63.2% 0.067 232.9)
-
Step 600
600 (this color)
#437A97
oklch(55.4% 0.074 233.3)
-
Step 700
700
#356781
oklch(49% 0.068 233.2)
-
Step 800
800
#2D5469
oklch(42.6% 0.056 233.8)
-
Step 900
900
#294655
oklch(37.8% 0.043 232.1)
-
Step 950
950
#182932
oklch(27% 0.028 232.3)
#437A97 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) | #6C7998 | 0.048 |
| Deuteranopia (no green cones) | #607097 | 0.042 |
| Tritanopia (no blue cones) | #018284 | 0.056 |
| Achromatopsia (no color) | #747474 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #437A97
#437A97
oklch(55.4% 0.074 233.3)
- #956749
#956749
oklch(55.5% 0.074 53.7)
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 #437A97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.010
- Stormy Blue #507B9C ΔE 0.017
- Dull Blue #49759C ΔE 0.019
- Metallic Blue #4F738E ΔE 0.023
- Muted Blue #3B719F ΔE 0.034
- Ocean #017B92 ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.039
- Grey Blue #647D8E ΔE 0.042
Use #437A97 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.